Minecraft hangs on the switch, why?

The Minecraft game of my son keeps hanging up. That He plays about 10 minutes. Then it gets stuck. After a few minutes Can he then continue to play normally? Until it hangs up again. This is going on for about 3 weeks now. Before that everything was normal. He plays on a Nintendo Switch, the game was downloaded from the e-shop. Switch to factory settings WITHOUT erasing memory data did not help. I'm not sure if it's the game or the switch. The console is about 1.5 years old. If you press the "Homebutton" it takes about 4 seconds. Until she reacts. It does not matter if it hangs or not. When he deleted 1 of his 30 worlds, it went back briefly. But then again the same problem. He has "only" 8 worlds left, all others have been deleted. The problem persists. Does anyone have an idea what that could be?

Maybe memory too full?

Thanks for the answer. How can I check if the memory is too full?

Either under system settings or album I think…

So, everything is trying. 20Gb free storage. Game re-downloaded. Still hanging. Will probably be due to the switch.

Then it's probably because of the switch…