I just upgraded my self-hosted Mattermost server from 2.1.0 to 3.0.2. I followed the upgrade guide here http://www.mattermost.org/upgrade-to-3-0/
I also upgraded my Linux desktop client from 1.1 to 1.2.
I have two separate accounts on two separate teams. Before the upgrade to the 3.0.2 server, I was able to log in to both accounts in different tabs in my browser at the same time with no problem. I was able to do the same in the desktop client. Now, however, I can only log in to one at a time.
My current workaround is to use a browser for one account, and the desktop client for the other, but this is not ideal.
How can I resolve this so that the behavior is the same as before the upgrade?