There haven't been any explicit fixes for this issue yet.
It seems like three different instances of this bug so far, then:
- Dead units lingering permanently.
- Dead units lingering for one or two rounds.
- Just encountered now in a local game: I conquered a Beastmen city, and there was a blank unit icon background in the army list on the overland map; there was no actual icon on it, just the background. When I clicked on this unit, the game crashed to desktop, no error message.
I tried again on a Bazzite laptop. Spent a while building Dwarf cities on Myrror; over hundreds of turns and regular attacks from raiders, no glitch. I conquer a neutral town, and 4-5 battles later, the glitch happens. The trigger seems to be conquering a neutral town on Myrror; I have not seen it otherwise. I'm not sure if it's the first town I conquer, or at random. I don't think it has anything to do with the race of the town; it's happened with towns of multiple different races. I don't know if it only happens if the town has defenders when I take it.