All companion lose their tags while shape shifting which kinda suck.
A bandage fix for now, look up the character quest on where it will trigger now without reading the flavour text much. When I know I'm in the quest area for that companion, I will turn of the shape shifting so I don't miss the text and the quest.
They still talk though even while shifted but for the exclamation dialogue, you will have to toggle the shape shift off first before talking to any of your companion for them to be involved again.
I do wish they remove this limitation though.