Companion bug—Emmrich cutscenes/quests don’t trigger

Immediately after recruiting Emmrich and before recruiting Taash, I hung around the necropolis for a while. Bad idea—Even Emmrich’s intro cutscene at the lighthouse doesn’t trigger. I can’t give him his gift (even though I bought it), none of his personal quests trigger (I made sure I didn’t progress too far or lock quests out), and out of curiosity I took him with me everywhere to raise his affinity just in case that was an issue. No dice. He’s at level 5 with me and I still haven’t seen the first cutscene where he is moving into the lighthouse. No idea what I did differently from my spouse who is at the same point in the game other than walking around the necropolis for half an hour or so after recruiting him. Has anyone else experienced this? I’m going to go back to an earlier save to recruit him again and hope that fixes it.