Does anyone else have an issue in the new hildibrand questlines...?

[Alukah]

I used to have that issue, not very frequent but happened several times, restarting the client would fix it, my client would also freeze when I'd go to a crowded zone after being online for too long, enabling "Cache LOD data when necessary" in System > Graphics fixed both the crashes and bosses not loading properly, thought enabling this option can cause some side effects.

EDIT - Actually disregard anything I said, I didn't read the part where you said scenes with them, I wouldn't rule out the possibility of corrupted patch, just in case try rolling back your FFXIV folder and re-patching.