Character disappears for no resaon after entering new level

I was adding a sixth scene to my game recently and after that, I discovered, that my character started to disappear in all stages (except the first one) after he enters them. He is always visible as he moves from the designated start point (character stands at) to a point he is told to move to (send character to position) and then just disappears, although you can still interact with it, you just cannot see it (so like "hide character" was activated). I checked all my At the beginning of scene commands but found no mistake there. Adding a specific "show character" does not help either. When I enter the main menu and then return to the game the character reappears tho, which does not make sense since the same At the beginning of scene is applied.

Thank you Esmeralda! It is indeed caused by the fading effect. I did change it while adding the last scene to "fade to new". I just changed it back to "fade in and fade out" and the character started appearing properly again.