I wanted to put all but my gourmand pet in the resort. I thought the easiest way was to book them all into Lakeview and then take my gourmand pet out from the pets page.

I've got this under my active pet who isn't in any resort at the moment -

This pet is in the resort! Remove

All the other pets who are booked into Lakeview don't have the option to remove them.

PS: The page finally updated but it was around 20 minutes before it did. I just managed to get my gourmand pet out in time. When I went to my next battle quest a minute later all my other pets were eligible to fight.

I just tried to remove my gourmand from the resort and clicking several times on the 'this pet is in the resort! remove' button and even hard refreshing doesn't appear to do anything. I'm assuming it's just cached, but it looks broken.