Hi,
i think i fixed that problem. It has something to do with AMD Adrenalin software and stuff.
I deinstalled every amd graphics driver via DDU.
Then i downloaded the latest amd driver but installed it via windows device manager. And only the driver not the Adrenalin software or something like that.
PS: a friend of mine got a rx 5500 XT and has the same problem.
This may be the fix for the problem.