No mods. Patch 3.1 is installed. Playing on one computer with bots. Start of the game. Initially, I had two squads: peasants and archers. I didn't deploy the archers because the autobattle resulted in a victory, and I wanted to test the hero's special ability. The peasant was in one squad. After his death, an angel appeared and started creating copies of the peasant endlessly. Preventing other creatures and the hero from taking their turn.
I would be very grateful if you could record a video; I can't do it, and I think there will be other people who could benefit from your video.
Regarding the rest:
Enabling/disabling NHF: https://www.youtube.com/watch?v=hkXEosK2EiU
Map processing: https://www.youtube.com/watch?v=JfLCsRfxAEk
If there are additional mods for creatures, then in the same window where NHF is enabled, you need to check the "Scan files" box.