The workaround for the freezing works for me.
Steps to close Minecraft or leave Realm without crash on Switch 1.16.20:
Press the home button
Launch YouTube instead of trying to close the app
Then close the app when YouTube prompts to do so
YouTube with close the app after a short time and then an error with show
You have now successfully closed Minecraft without a crash during the dark days of 1.16.20
I find the worst part is often closing the app on the Switch after playing in a Realm it somehow freezes the entire Switch in its own Home Screen
I have to long press the hardware power button to power cycle
Ive first experienced this restarting the application to resolve an issue where my inventory and crafting wouldnt open as if i wasnt even pressing the x or y buttons
I have reinstall the application from scratch hoping a clean reinstall would resolve the issue
This did not resolve the freezing issue.
I would imagine everyone who updates will experience this
Im happy to troubleshoot more but I cant think of how any other Switch running this build could have better results
I also experienced this issue
After some troubleshooting I found I had to make the portal within the nether and I had to try a few time to get it to link to the overworld portal
Elevation seemed to be the factor that changed the outcome