Hi @wweich ,
Thanks for your detailed test and insight. I conclude this has something todo with the api / sdk levels. Syncthing-Fork already has compatibility and target at ‘r’ (Android 11, sdk 30). Syncthing official targets api 28. Would you mind giving me feedback for the forked APK release 1.9.0.2 ? It’s available here https://github.com/Catfriend1/syncthing-android/releases/download/v1.9.0.2/com.github.catfriend1.syncthingandroid_v1.9.0.2_7249908a.apk
That would be great - if it doesn’t take too much of your time.