Anyone that's experiencing continuous screen locking or crashing when using full screen applications, it appears to be an issue with gesture navigation. I enabled the old navigation bar and the issue seems to be completely resolved. Hope that helps someone else out! Was going to be a long couple weeks!
Everything else seems to be much improved on this beta, much smoother performance and improved battery life!
Seen it on another thread and what fixed my issues with this was. Display>font default. Then power off. Volume up + power to Samsung boot logo. Wipe cache partition and then repair apps. Fixed my issue with above and fixed my TikTok from crashing