I believe the flag must be declared somewhere in the compiler, but where?Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
My research has shown that API 30 and above requires declaration of either FLAG_IMMUTABLE or FLAG_MUTABLE to run on the latest Android 12 or 13 devices.
The app runs fine on Android 11 devices but won't even start on 12 or 13 devices.
Any pointers would be greatly appreciated so I can hunt this problem to its root.
Thanks in advance,
Jazzy J