Disconnections after using Uul Netol's Trophy Spectre

After I started using Uul Netol's Trophy monsters as Spectres a few days ago, I've started getting unexpected disconnections that remove instances and roll me back a few minutes, at least once or twice per ~6 hours of play. They occur in combat and out of combat, regardless of what I'm doing.

Not sure what logs or dumps can be provided, but if there's something I can do, please let me know.

Notably there's one other bug with those Spectres, where the Corrupting Blood debuff they apply can hit and damage enemies even after the Player dies - making them the only Spectres that can damage stuff after death, which I imagine is a bug as well.