Hello @Hasbilbo
I understand the frustration connected with this situation. Of course, it would be great, if you sent us Error reports via Samsung Members app (with log files) for each problem. So our developers can analyse the problem and find its source.
That is also the reason for this whole Beta. People are using their device in a unique way, with countless different apps, that when interacting with the devices produce various situations. I have been using Note 20 with a Beta software, and I have not experienced the problems you mentioned. I did have some other errors, which I have reported. Also the binary has improved from one version to another. That is why those error reports are extremely important.
But your situation is very troublesome. What I would suggest in this situation is to use Smart Switch to downgrade to the previous Android version. Clear the cache and then if you want, to rejoin the Beta and see if there is a difference. Since it's not a global problem, there might be some process on your device that malfunctioned and is causing this problem. Resetting the device might actually help with it.
From my side, I can assure you that our development team is working as hard as they can, to release the most stable binary as soon as it is possible 😊
