Hard to believe it is not reported before but I couldn't find a thread about it so... here goes nothing.
When you summon any non-ult sorc pet, if you spam the pet ability to activate the "pets ability" you summon the pet again, the previous one disappears and a new one appears but since it makes you waste so much time, by the time you summon your pet "the second time" bcz of this bug, the world comes to an end.
I had this bug for years but didn't had forum access, sorry bcz it's probably reported before.