What were you doing:
Switching from a dark theme to a light theme while system is in Light Mode.
What feature did you use:
Theme switcher in Bears settings.
The icon indicating the selected theme (for Light Mode) stayed visible on the former selected theme.
What did you expect to happen:
I expect the icon to only show on one theme, as it is impossible to have two themes active at the same time.
Wait a minute…
On second look this is actually normal behavior. Not a bug. My bad.
I think I was confused because of the previous situation. In Bear 1 (and currently iOS) all themes show these icons, only highlighting the selected ones.
Suggestion: maybe adding the and icons to the macOS version would make it more understandable at first sight. (also, more in sync with theme switching on iOS.)