get the message that it couldn't be maintained... At least before I'd see the message that Personae couldn't be maintained, as of this last patch I can't buff the pet nor does it survive zoning.
I know we have been having pet problems since the reprecussions update. To be honest this doesn't suprise me that it despawns... however I agree we should at least get the warning. I will have to check my logs to see if it says that it couldn't be maintained.