How can I get three-state vertical tabs back?

Context: In the customize sidebar section, if the "Vertical tabs" checkbox is checked, the vertical tabs can be switched between showing names and favicons, or just favicons. If, additionally, "Hide tabs and sidebar" is checked, then vertical tabs instead can be switched between showing names and favicons, or being completely hidden. (These settings are in the photo I uploaded) The recent update seemed to add a feature I had been really wanting from vertical tabs. I could switch between all three states: favicons and names, just favicons, or completely hidden. I could do this by dragging the vertical tab pane smaller or bigger. A few days later, though, it stopped working, but I didn't change any settings (as far as I remember). Is there any way to get the three-state vertical tabs back? They were really nice!