Krugs is resetting abnormally.

I recently played a game as a jungler. It started off normally with a leash at krugs, and I was left to clear the camp. All of a sudden is begins to heal like it would when it resets.

(In case anyone is wondering, I wasn't dragging it out or anything, I was just attacking it in its camp)

I fell behind but luckily got carried by a , but still this shouldn't be happening.