In the First level i change my Charakter Skin with a Button and then Jump to the next Level.
Someone has a quick Answer to that? YES i do have a Post Process Volume in Level 2.
Given that this only happens in-game, there are two potential causes that I can think of.
One, you are triggering some sort of effect in-game that is causing this. A blur is hard to accidentally do, so it must be in the postprocess or camera.
Two, it’s your camera. Are you using a regular game camera? It looks like your camera is for some reason not focusing correctly on your player and you have some form of Depth of Field enabled.
Let me know if you were able to find the problem from these suggestions.