Progress indicator above tab bar

[prokoudine]

Starting at two open tabs, Minder gets a circular progress indicator at the center of the tab bar:

I purged the local config folder, purged system directories of all traces of Minder, then did a clean build and install from git, and I just can't get rid of it.

This is currently on Ubuntu 23.10, but I've seen this on earlier versions of Ubuntu for the past year or so, I just haven't reported it before.