It's not just pets. Normally when Rebirth is cast, after the healing, it the camera stays on the last person who was healed while it gives the shields. This is a bug and I wish for it to be fixed.
Oddly, this problem seems to come and go. I posted something about my Jade Hound--camera shifts above my head when he casts--but then I found my Wildfire Treant doing it as well. But sometimes the camera is where it should be...it's weird, but I assume they'll sort it out eventually.
I have been having the same issue, and. I really hope. Kingsisle fixes this bug. I only ever see some glitter in the background while my pets casts spells. I only noticing it happening on my forest lord pet. My yuletide spirit is fine casting unicorn but forest lord has trouble casting sprite. Kingsisle please fix this bug.