Keeps asking me for password randomly and then locks UI

After updating to 2.2, SourceTree is asking me every time (and randomly while browsing repo) for password. I enter the password, and then it locks the UI (E.g. menu items are greyed out, even Help->Raise a support ticket). Clicking anywhere will result in hearing the error sound coming from the OS. "Solution" is to kill and restart sourcetree, until it asks you again for the password.

(Note that this also happened while installing 2.2, where it asked me to agree to the terms and conditions, and the tickbox was not clickding and only hearing an error sound. Had to kill and relaunch source tree).

I am reverting back to 2.1 until this is solved. That version was also asking me for password everytime, but at least only when pushing.