I use checkra1n 13.3.1 on iPad 6, but this happened on 12.4 unc0ver as well.
I download certain IPAs (unzip them to /Applications, chmod 777 the binary, run uicache), and they work, but as soon as I press the iPad power button to put it to sleep (or close the cover), the app will crash with a "0xdead10cc" deadlock crash.
For example Spotify Premium IPA 8.5.45 or any other previous version
If I open it and then close the cover, spotify crashes. But if I play a song and close the cover it does not crash.
If I download Spotify Free from the App Store it does not crash if I close the cover immediately when it is not playing a song.
I read the /var/mobile/Library/Logs/CrashReporter file:
Exception Type: EXC_CRASH (SIGKILL) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: Namespace RUNNINGBOARD, Code 0xdead10cc Triggered by Thread: 0
I notice the exact same dead10cc crash happens with Good notes IPA from this site when I put the iPad to sleep, but it otherwise works normally.
Is there a known problem with app cracking that only shows up when putting the device to sleep?