Hovering Hotpot Issues

After getting 3/4 kills on hovering hotpot for my new dagger relatively easily, the 4th pop is taking much longer than it should be. I have been online camping it continuously for 18.5 hours now without a single pop. I know which skeleton is the placeholder, and I have been killing it, and sometimes the other skeletons every 16 minutes. Any ideas why this thing wont pop?

Kill the south pot.

Alrighty, let's see if that works

Mind you, other people have been killing the pots on and off while I've been camping this, so I doubt that's the problem.

edit: Didn't pop it this time. I'll try it a few more times though.

edit: Finally popped after 22 hours