Ironfist before version 1.3.0 (save files are still compatible with original save files)
Save: a 0 9993 9814 two ai heroes vanish after combat 10.GX1
End the turn.
The two AI heroes Jaclyn and Thundax disappear after combat during the AI's turn.
You may have to reload the save file multiple times for this to happen.
Files: Two AI heroes disappear after combat.7z