So after 20 hours with Cait she suddenly stopped assisting me. I have the whole affection thing at max so no probs there, but after I asked her to enter power armour for the first time she said 'I'll get it done' but didn't move. Since then I can talk to her and she responds but does not carry out my instructions, does not assist in combat and does not stay by my side, instead remaining wherever we spawned after fast travel etc. She also regularly falls to the floor as if injured before getting up again. Anybody else experiencing similar?

I've switched companions for a while, sent her to different places, done a bunch of quests without her but when I pick her up again she's exactly the same.

Typical woman, gaining my affection then turning stone cold on me.