Playing on Xbox One. I started a level 1 explore in Dhrak-Zum with Gnome-a-palooza active. There were a few battles with 3 gnomes and a Doom of Stone. It appears that gnome-a-palooza is not properly replacing this troop (and possibly other dooms) with gnomes.
Next time I’m able to craft a gnome-a-palooza, I’ll test explore in other kingdoms with a doom troop.