I'm not trying anything that has flappy in it's name
no live display setting :(
There is Night Light which is similar to Live Display or you can install various apps from Play Store if it feels too limited in options
Using Aosip 10.0 for about 2 weeks now and can't complain.
Similar behaviour started to happen to me after flashing new bootloader via ODIN, but instead of booting to Android, my phone just turns off. At first I thought recovery got overwritten, but I still could boot into it from Android restart menu