Any time you try to exit out of Minecraft, both the game and Nintendo Switch freeze for long periods of time. You can't access any menus or turn off the console. The 1.16.20 hotfix says that crashing issues have been addressed, but it seems to have made it worse. I had never had this problem before, and it is extremely frequent now.
Thank you for your report!
We're actually already tracking this issue at MCPE-95621, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki