Can't see blueprint content at viewport 4.25.1

I have a problem with blueprints. I created some blueprints and edited them in some classes like (character or game mode). And they were works fine. I mean still they can work but can’t see anything. There was no problem until i closed the editor. Next time i lunch the editor, i didn’t see any content in blueprint viewport. My blueprints have cpp parent classes. I’m just wondering is this a bug or something else? Check theme how they look like:

Window > Class Defaults