We went toc10 hc today, and got to champs. When we pulled them, within 10sec they would reset. Tried pulling with different abilities like charge and deathgrip. Lost 4 tries so far.
It happened to us during a togc 25 a few weeks ago, the warrior was stuck and didn't come with the others npc, even after a soft reset. We ended up getting the help of a very nice GM who summoned him before each pull.