I signed out of my minecraft account to troubleshoot while assisting a friend with the same issue, when attempting to sign back in it gave me a prompt stating "Oops! Looks like the Microsoft Account you are trying to use is already connected to another account on "Playstation Network".

Please sign with a Microsoft Account that is not already linked to an account on "Playstation Network"."

After this message is displayed,  I can log into any new Microsoft Account and repeat this aforementioned glitch. I'd like to log back into my account and if there is any solution, help would be greatly appreciated. I believe it's an error refreshing Microsoft Account data on the server side, as I've already uninstalled and reinstalled the game, as well as deleted saved data, and checked Network connection. My Playstation account has no problem signing into new Microsoft accounts, so it's not Playstation Network's end, I have reason to believe it's a Mojang bug affecting Microsoft accounts.

This glitch can be replicated by going into settings > profile > unlink microsoft account. From there a prompt should show, stating that the game failed to unlink, after which, you should go to settings > profile > sign out of Microsoft Account. And if done correct, you won't be able to log back in.