When signing out of a Microsoft account via Settings in Minecraft, when I press Sign In it automatically shows a message on the screen saying "Welcome Back (my alt accounts username), Let's Play!".  When I tap on the option above that to sign in to a different account, Minecraft shows the loading screen for one second, then it asks me if I want to sign in to the exact same account shown before, again. This loop continues forever.

Basically, it won't let you sign in to a different account to what you were already signed into. I have been unable to sign into my main Microsoft Account because of this and I can't play with my online friends, this needs to be fixed.

I have tried to clear my sign in data for that device, but the button does not work as I have specified how in my bug report for that issue (MCPE-129704). I have found no work-arounds for this.