We still don't know how the bug happened, but the characteristic of the bug is that it looks like the beta was canceled in an instant and it takes less than a second to download the mark again.

Originally, beta is canceled only after a long time, but if you look at the video, it seems to have been canceled, but the beta test remains the same even if you go in.

The solution to this bug is to wait for the official release of the current Minecraft large-scale update. If I update it officially, beta disappears

I'm tired of having to wait for months when I catch this bug. Please tell me the solution to this bug

https://1drv.ms/v/s!Amazuzfy89GmgWi9tUCmqP4edgXp