Non-rooted, Android 11. Problem arises with some modded and paid apps like Photomath, Devcheck and Facetune.

The apps can only be opened once after a fresh install. The next time they either crash immediately or they get stuck immediately. They must have done a license check online and probably made a note in a file somewhere for which the app looks for when it's first opened and then prevents it from working again. Doesn't matter if internet is disabled or if trying other versions

Any help on this or other topics about the same problem?

I`ve noticed similar problems bro with modded Turbo VPN. Every single time I install a new version or do clean install, it asks me to sign in account which you can bypass but allows you VIP server access. Next time I go in, it will say I`ve downloaded an illegal version and redirects me to play store. Some app developers have clearly gone to the trouble to check to see if you have paid premium so the next time you open them, they don`t work anymore.

The problem with Android 11 phones is most support arm64 processor which normally will be a split APK so any modder has to either turn the split into a single APK for distribution or only have armv7a mod version and I think this could also be causing crashes. If you explore split APK files there`s always an XML file which details the file names for each split APK so if a modder has turned that split into a single APK it`s gonna cause problem

[ill420smoker]

@dejed19263, I suspect it is related to the signature spoofing (aka SignatureKiller) which modders may have utilized in apps that are protected with signature checks. (I know for a fact Facetune requires such medicine)

I've commented about this here as welll:
viewtopic.php?p=8867997#p8867997

Cheers