When 1.16 came out I've had to sign in on my Microsoft account again once and it would stay signed in.
But after 1.16.20 when I start up the game it asks me every time to sign in. So I sign in like usual but it fails most of the time.

Here's the process:
I click the 'sign in' button on the main menu.
Then it comes up with the code, I fill it in on Google Chrome on my phone and I enter my account details.
After that it says it's connected. So I go over to the game and it comes with an error message (included in attachment).

I have attempted this multiple times and most of them failed.