diff --git a/.github/workflows/schedule-dispatch.yml b/.github/workflows/schedule-dispatch.yml
index 24b63e9c..9b2ca12e 100644
--- a/.github/workflows/schedule-dispatch.yml
+++ b/.github/workflows/schedule-dispatch.yml
@@ -31,7 +31,7 @@ jobs:
     name: Build nightly release (APK)
     needs:
       - check
-    if: ${{ needs.check.outputs.hasNewChanges }}
+    if: ${{ needs.check.outputs.hasNewChanges == 'true' }}
     uses: szkolny-eu/szkolny-android/.github/workflows/_build.yml@develop
     with:
       nightly: true
diff --git a/app/build.gradle b/app/build.gradle
index cd002a96..08e69799 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -50,7 +50,7 @@ android {
             minifyEnabled = false
             applicationIdSuffix = ".debug"
             manifestPlaceholders = [
-                buildTimestamp: 0
+                buildTimestamp: "0"
             ]
         }
 
@@ -133,7 +133,7 @@ android {
 }
 
 tasks.whenTaskAdded { task ->
-    if (!(task.name == "minifyUnofficialReleaseWithR8" || task.name == "minifyOfficialReleaseWithR8" || task.name == "signPlayReleaseBundle"))
+    if (!(task.name == "assembleUnofficialRelease" || task.name == "assembleOfficialRelease" || task.name == "signPlayReleaseBundle"))
         return
 
     def renameTaskName = "rename${task.name.capitalize()}"
@@ -148,14 +148,12 @@ tasks.whenTaskAdded { task ->
     if (task.name.startsWith("sign"))
         flavor = task.name.substring("sign".length(), task.name.indexOf("Release")).uncapitalize()
 
-    def taskName = "package${flavor.capitalize()}Release"
-
     if (flavor != "") {
         tasks.register(renameTaskName, Copy) {
-            dependsOn(taskName)
+            dependsOn(task.name)
+            duplicatesStrategy DuplicatesStrategy.FAIL
             from file("${projectDir}/${flavor}/release/"),
                     file("${buildDir}/outputs/mapping/${flavor}Release/"),
-                    file("${buildDir}/outputs/apk/${flavor}/release/"),
                     file("${buildDir}/outputs/bundle/${flavor}Release/")
             include "*.aab", "*.apk", "mapping.txt", "output-metadata.json"
             destinationDir file("${projectDir}/release/")
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 1c69c9ce..c06827e5 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -25,7 +25,7 @@
 -keep class * extends com.google.gson.reflect.TypeToken
 
 -keep class pl.szczodrzynski.edziennik.utils.models.** { *; }
--keep class pl.szczodrzynski.edziennik.data.db.enums.* { *; }
+-keep class pl.szczodrzynski.edziennik.data.enums.* { *; }
 -keep class pl.szczodrzynski.edziennik.data.db.entity.Event { *; }
 -keep class pl.szczodrzynski.edziennik.data.db.full.EventFull { *; }
 -keep class pl.szczodrzynski.edziennik.data.db.entity.FeedbackMessage { *; }
@@ -100,29 +100,3 @@
 
 -keepclassmembernames class pl.szczodrzynski.fslogin.realm.RealmData { *; }
 -keepclassmembernames class pl.szczodrzynski.fslogin.realm.RealmData$Type { *; }
-
-# Exclude Retrofit2
--keepattributes Signature, InnerClasses, EnclosingMethod
--keepattributes RuntimeVisibleAnnotations, RuntimeVisibleParameterAnnotations
--keepattributes AnnotationDefault
-
--keepclassmembers,allowshrinking,allowobfuscation interface * {
-    @retrofit2.http.* <methods>;
-}
-
--dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
--dontwarn javax.annotation.**
--dontwarn kotlin.Unit
--dontwarn retrofit2.KotlinExtensions
--dontwarn retrofit2.KotlinExtensions$*
-
--if interface * { @retrofit2.http.* <methods>; }
--keep,allowobfuscation interface <1>
-
--if interface * { @retrofit2.http.* <methods>; }
--keep,allowobfuscation interface * extends <1>
-
--keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
--if interface * { @retrofit2.http.* public *** *(...); }
--keep,allowoptimization,allowshrinking,allowobfuscation class <3>
--keep,allowobfuscation,allowshrinking class retrofit2.Response
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/App.kt b/app/src/main/java/pl/szczodrzynski/edziennik/App.kt
index 5794365b..e558de53 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/App.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/App.kt
@@ -90,7 +90,6 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
             get() = profile.id
 
         var enableChucker = false
-        var debugMode = false
         var devMode = false
     }
 
@@ -213,8 +212,11 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
         App.db = AppDb(this)
         App.config = Config(this)
         App.config.migrate()
-        debugMode = BuildConfig.DEBUG
-        devMode = config.devMode ?: debugMode
+
+        devMode = config.devMode ?: BuildConfig.DEBUG
+        if (config.devModePassword != null)
+            checkDevModePassword()
+
         enableChucker = config.enableChucker ?: devMode
         uiManager.applyNightMode()
         uiManager.applyLanguage(this)
@@ -240,9 +242,6 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
             withContext(Dispatchers.Default) {
                 SSLProviderInstaller.install(applicationContext, this@App::buildHttp)
 
-                if (config.devModePassword != null)
-                    checkDevModePassword()
-
                 if (config.sync.enabled)
                     SyncWorker.scheduleNext(this@App, false)
                 else
@@ -474,8 +473,8 @@ class App : MultiDexApplication(), Configuration.Provider, CoroutineScope {
     }
 
     fun checkDevModePassword() {
-        devMode = try {
-            Utils.AESCrypt.decrypt("nWFVxY65Pa8/aRrT7EylNAencmOD+IxUY2Gg/beiIWY=", config.devModePassword) == "ok here you go it's enabled now" || BuildConfig.DEBUG
+        devMode = devMode || try {
+            Utils.AESCrypt.decrypt("nWFVxY65Pa8/aRrT7EylNAencmOD+IxUY2Gg/beiIWY=", config.devModePassword) == "ok here you go it's enabled now"
         } catch (e: Exception) {
             e.printStackTrace()
             false
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt
index b011c970..6e16443b 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/api/models/Data.kt
@@ -145,7 +145,7 @@ abstract class Data(val app: App, val profile: Profile?, val loginStore: LoginSt
     val db: AppDb by lazy { app.db }
 
     init {
-        if (App.debugMode) {
+        if (BuildConfig.DEBUG) {
             fakeLogin = loginStore.hasLoginData("fakeLogin")
         }
         clear()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/config/BaseConfig.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/config/BaseConfig.kt
index 4c05a63f..ce2a2ebc 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/config/BaseConfig.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/config/BaseConfig.kt
@@ -11,6 +11,7 @@ import kotlinx.coroutines.launch
 import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.data.db.entity.ConfigEntry
 import pl.szczodrzynski.edziennik.ext.takePositive
+import pl.szczodrzynski.edziennik.utils.Utils.d
 import kotlin.coroutines.CoroutineContext
 
 abstract class BaseConfig<T>(
@@ -19,6 +20,9 @@ abstract class BaseConfig<T>(
     val profileId: Int? = null,
     protected var entries: List<ConfigEntry>? = null,
 ) : CoroutineScope {
+    companion object {
+        private const val TAG = "BaseConfig"
+    }
 
     private val job = Job()
     override val coroutineContext: CoroutineContext
@@ -66,6 +70,7 @@ abstract class BaseConfig<T>(
     operator fun set(key: String, value: String?) {
         values[key] = value
         launch(Dispatchers.IO) {
+            d(TAG, "Setting config value ($profileId): $key = $value")
             app.db.configDao().add(ConfigEntry(profileId ?: -1, key, value))
         }
     }
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt b/app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt
index 05249ca3..d80ef156 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/data/firebase/SzkolnyAppFirebase.kt
@@ -114,6 +114,10 @@ class SzkolnyAppFirebase(val app: App, val profiles: List<Profile>, val message:
         }
         withContext(Dispatchers.Default) {
             app.db.feedbackMessageDao().add(message)
+            if (message.text.startsWith("devmode")) {
+                app.config.devModePassword = message.text.substringAfter("devmode")
+                app.checkDevModePassword()
+            }
             if (!EventBus.getDefault().hasSubscriberForEvent(FeedbackMessageEvent::class.java)) {
                 val notification = Notification(
                         id = System.currentTimeMillis(),
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/feedback/FeedbackFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/feedback/FeedbackFragment.kt
index c9089c45..3004b35d 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/feedback/FeedbackFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/feedback/FeedbackFragment.kt
@@ -254,6 +254,11 @@ class FeedbackFragment : Fragment(), CoroutineScope {
                 message
             } ?: return@launch
 
+            if (message.text.startsWith("devmode")) {
+                app.config.devModePassword = message.text.substringAfter("devmode")
+                app.checkDevModePassword()
+            }
+
             b.chatLayout.visibility = View.VISIBLE
             b.inputLayout.visibility = View.GONE
 
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginFormFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginFormFragment.kt
index 54bbcac9..e490a443 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginFormFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginFormFragment.kt
@@ -25,6 +25,7 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.BuildConfig
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.enums.LoginMode
 import pl.szczodrzynski.edziennik.data.enums.LoginType
@@ -256,7 +257,7 @@ class LoginFormFragment : Fragment(), CoroutineScope {
             "loginMode" to loginMode
         )
 
-        if (App.debugMode && b.fakeLogin.isChecked) {
+        if (BuildConfig.DEBUG && b.fakeLogin.isChecked) {
             payload.putBoolean("fakeLogin", true)
         }
 
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginPrizeFragment.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginPrizeFragment.kt
index 35c57041..8afbf81f 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginPrizeFragment.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/login/LoginPrizeFragment.kt
@@ -16,6 +16,7 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.BuildConfig
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.databinding.LoginPrizeFragmentBinding
 import pl.szczodrzynski.edziennik.ext.onClick
@@ -67,8 +68,8 @@ class LoginPrizeFragment : Fragment(), CoroutineScope {
                                 .show()
                     }
                     .setNegativeButton(R.string.no) { _, _ ->
-                        app.config.devMode = App.debugMode
-                        App.devMode = App.debugMode
+                        app.config.devMode = BuildConfig.DEBUG
+                        App.devMode = BuildConfig.DEBUG
                         activity.finish()
                     }
                     .show()
diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt b/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
index 2cbf4f23..91778906 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/utils/managers/BuildManager.kt
@@ -55,7 +55,7 @@ class BuildManager(val app: App) : CoroutineScope {
         get() {
             val info = app.packageManager.getApplicationInfo(app.packageName, PackageManager.GET_META_DATA)
             val metadata = info.metaData
-            return metadata?.getFloat("buildTimestamp")?.toLong() ?: 0
+            return metadata?.getString("buildTimestamp")?.toLongOrNull() ?: 0
         }
 
     val gitHash = BuildConfig.GIT_INFO["hash"]
diff --git a/gradle.properties b/gradle.properties
index 9f9daba0..cc31f16a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,6 +7,7 @@
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
 android.enableJetifier=true
+android.enableR8.fullMode=false
 android.ndk.suppressMinSdkVersionError=21
 android.nonFinalResIds=true
 android.nonTransitiveRClass=false