In favorites (latest 1.20-beta):

1) Essentially, if I fill in the connection details, I save the favorite, I connect, and I disconnect, the connect screen is empty except for Replica Set Name. If I click on the favorite that is already selected then the connection details are filled correctly.

2) Replica Set Name does not change if I switch to another favorite and if I change it, I get the banner that says some changes have been made but then if I discard the change, they are not discarded in that particular field.