When I minimize Totalfinder, and I have multiple tabs open, it sometimes focuses on the first tab when I open Totalfinder again. It doesn’t show this behaviour all the time though, so it’s hard to say when exactly it starts doing it.
I have the same problem but found it only happens when:
-The Finder window is hidden behind another application
-I switch to a different space
-I click the Finder icon on the dock and it jumps back to that space, brings it forward and focuses on the first tab
If the window is on top and I switch spaces it keeps focus on the last used tab like it should. This is definitely a new behavior as it used to always give focus to the previous tab no matter what.