Hello @Bill_MI, I'm using Arc-Dark theme with Papirus icons. For window manager I have Marco(adaptive compositor). Made a video of it to show how it only moves when using the arrows, otherwise it just opens/closes the pop up.
For me it doesn't focus on the desktop. It just closes the pop up.
Anyway, I think I may have figured out what's wrong with it. My default keyboard layout is English US Int with dead keys. If I change it to English US I can move between windows by pressing the `/~ button. What layout are you using?
Seems similar to the clock applet only showing the 12 hour option to English region bug.