PS. My hunch: Most likely has something to do with the app attempting to launch after external monitor configuration changes.
Said external monitor configuration changes happen if you accidentally hit Super + P to toggle between Single monitor and Joined monitor modes and then hit it again to go back to Joined monitor upon with #GNOME summarily forgets the configuration you had before and concocts a different one on the spot (eat that, AI), forcing you to manually set up your monitors again.