Shem Freeze

Update:  I have now gone through each of my three children having time with Dad being unable to play Minecraft with me again.  In addition, they are unable to play with each other as the accounts will not remain logged in.  Please provide an update or ask for additional information.

This is still an issue.  I got my daughter 8 logged in created a game and then joined it from my computer.  Everything looked good so I jumped out and 5 minutes later when my daughter came to play with me it had signed her how.  Now when we select the sign in with  microsoft it gives us the save to microsoft account option but nothing happens when slecting it.  We have tried foce closing the app and a reboot of the device.