Hello -
I am running into the same problem. After the upgrade I can't have multiple tabs open for my different teams. I just tried to invite myself to one of my other teams from the Primary Team I am a member of, but when I try to join the new team I get a message that says my email address is already exists.
Also, before the upgrade I was able to switch between teams by clicking on the left side panel and selecting switch to TEAM, but I don't see that option.
