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[Bug]: Push notifications not displayed with R8/minify enabled (Android, SDK 5.6.1, AGP 9) #2582
Description
What happened?
Hi,
On Android, push notifications are received (I see "NotificationWorkManager enqueueing notification work" in logcat) but never shown when the app is built with minifyEnabled = true (R8). With minify and shrinkResources disabled, everything works and I see "NotificationWorker running doWork", "Fire remoteNotificationReceived", and "Worker result SUCCESS" for NotificationGenerationWorkManager$NotificationGenerationWorker.
OneSignal SDK: 5.6.1 (current); I also tried 5.7.2 – same behaviour with minify ON.
Android Gradle Plugin: 9.0.1
Build: prodRelease with minify + shrinkResources enabled
Device: Pixel 8, Android 16 (API 36)
Is there a known issue or recommended ProGuard/R8 configuration for SDK 5.x (5.6.1 / 5.7.2) with AGP 9 so that notifications are displayed with minify enabled? If you need full ProGuard rules or a logcat snippet, I can provide them.
Thanks.
Steps to reproduce?
1. Install app
2. Request permission
3. Grant permissions
4. Trigger push
5. See push ONLY in logs (push not shown on device)What did you expect to happen?
I expected to receive push notification.
OneSignal Android SDK version
Release 5.7.2
Android version
15
Specific Android models
Pixel 8 Android 16Relevant log output
OneSignal [package] D [main] ApplicationService.handleLostFocus: application is now out of focus
OneSignal [package] D [main] NotificationWorkManager enqueueing notification work with notificationId: [redacted] and jsonPayload: {"google.delivered_priority":"high",...,"alert":"...","title":"...",...}
OneSignal [package] D [main] ApplicationService.onActivityStarted(0,APP_CLOSE): [package].MainActivity@...
OneSignal [package] D [main] ApplicationService.handleFocus: application is now in focusCode of Conduct
- I agree to follow this project's Code of Conduct
Activity
StringMeUp commentedon Mar 19, 2026
Yeah baby!
sherwinski commentedon Mar 20, 2026
The fix for this was published in v5.7.4 🚀
StringMeUp commentedon Mar 23, 2026
Version 5.7.4 -> To make it work still had to add:
-keep class androidx.work.OverwritingInputMerger {
public ();
}
abdulraqeeb33 commentedon Mar 23, 2026
@StringMeUp - could you please share the steps to reproduce this error?
StringMeUp commentedon Mar 23, 2026
Description
I'm still seeing push notifications fail in minified Android builds with
com.onesignal:OneSignal:5.7.4, even after the fix from PR #2585.The push reaches the app and OneSignal enqueues notification work, but the notification is never displayed in a minified build unless I add extra app-level ProGuard rules.
Environment
5.7.49.0.19.1.02.8.1isMinifyEnabled = trueisShrinkResources = trueWhat fails
WorkManager then fails to instantiate androidx.work.OverwritingInputMerger in the minified build:
java.lang.NoSuchMethodException: androidx.work.OverwritingInputMerger. []
at java.lang.Class.getConstructor0(Class.java:3379)
at java.lang.Class.getDeclaredConstructor(Class.java:3061)
at androidx.work.InputMerger.fromClassName(InputMerger.java:65)
at androidx.work.InputMergerFactory.createInputMergerWithDefaultFallback(InputMergerFactory.java:61)
at androidx.work.impl.WorkerWrapper.runWorker(WorkerWrapper.java:215)
at androidx.work.impl.WorkerWrapper.run(WorkerWrapper.java:145)
WM-WorkerWrapper E Could not create Input Merger androidx.work.OverwritingInputMerger
What works
Example log:
OneSignal D NotificationWorkManager enqueueing notification work with notificationId: ...
fix: keep WorkManager InputMerger for R8; minified demo + CI
fix: keep WorkManager InputMerger for R8; minified demo + CI