Are you supposed to be able to attack Dark Elves that you’ve recruited? I found today, after recruiting a number of dark elves, that they were disappearing from my party even though there were no enemies around. I then found that my keeper was hitting them every time I tried to walk into the tile that they occupied. I don’t have the save where this was happening, so I’ll try to recreate it at some point, unless this is intended.
It shouldn’t happen normally, and I can’t replicate it just by starting a game and recruiting them. Any chance that you angered the whole dark elf tribe by stealing from the shop or something similar? It’s possible that the game still lets you recruit after you’ve done that. I’ll make sure to check this later.