It has happen more than once now, but my pets are getting checked-out before the limit of 21 days. I am pretty sure someone else pointed it out, but I'm surprise it still hasn't been fixed?

It hasn't happened to me, my pets were in the middle of their stay when this first cropped up but they're due to be checked back in and I'm avoiding it until this gets fixed :/

I've had this too. about 1/3 of my pets were checked out while the others still had 16 of their 21 days left.