Stay signed into secondary Teams account (guest account)
In addition to my primary Teams account, I am a guest member of an external Team. In order for me to interact with the external Team I have to sign out of my primary account and into the secondary account. This is less than desirable.
I lose contact with the team I sign out of until I sign back in. Both accounts should be logged in at all times allowing me to participate and interact with both my primary and secondary (guest) teams at all times without interruption of communication.
As guest accounts are quite new to the Teams experience I can understand why this feature hasn't been fully developed yet, but it's going to have to be in the near future. Let's get it out of the way now before it becomes a major problem down the line.
Anthony G commented