I think OP meant class dev, not class leader.
The pet pathing seems to be fine to me. But the trapping is 100% bugged. They even fixed it in the beta, and there are videos proving that the FD+Trap bug being experienced isn’t part of how it worked in vanilla.
For full info on the bug itself, if you move your mouse, touch the keyboard, or get hit during Feign Death, you won’t drop combat (thus can’t use Freezing Trap).
One of a few threads bringing it up.
It’s noted as a bug, sort of? Though the bug listing says it’s only happening in BGs when it’s happening everywhere.