Player collision exploted

I was working on a project in UE 5.4, but when I opened it one day, my third-person character fell through the floor. Someone suggested checking the player collision view, and it was extremely buggy. I have no idea how to fix it.

Here a video example of the problem:

It seems the issue might be that the collision sphere for the third-person character is missing, which could be causing the player to fall through the world. I recommend double-checking to ensure that the third-person character has proper collision settings in place.

Dont think so, because the problem is seen even not using the third person system. I check and the collision bubble seems ok (Default)