CrimsonKnight13, I never managed to work with the tablet, my child does not want to give it away for anything. TWRP v2 which I posted signed by avb, but not patched by magisk23. I haven't tested TWRP yet. Should I post the next version of twrp patched with magisk23?
CrimsonKnight13 It looks like I found the cause in gsi instability. I slightly misported twrp, twrp is missing avb signature and wrong block sizes. I'll fix it now.
Perhaps this link will be useful for our tablet in terms of stability, did not check
https://forum.xda-developers.com/t/driver-9-0-adreno-500-series-opengl-vulkan-drivers-v-474-0-1-1-128.4042619/
I had to reinstall the stock firmware mod 6gb due to the hang of any gsi build, it freezes several times a day. The reason is not clear. Apparently for this reason, everyone is switching back to stock.
Is your tablet charging in this state?
Check how the tablet reacts to a combination of buttons. To bootloader and recovery.
I'll give you a qsn backup, only later
Try to flash the stock European firmware first and start the tablet, and then flash the Chinese firmware via qfil. Perhaps this is due to revisions, the tablet behaves differently.