DESCRIPTION: I was farming murmurs in a squad, and used Shadow's Embrace on a downed thrall. The thrall ragdolled the usual duration, but after standing up again it couldn't be mercied anymore. The mission was a defense, which made us unable to finish with the bugged thrall, and forced us to abort. I tried mercying some thralls while they were ragdolling, which worked normally, even if it looked goofy. Haven't yet properly checked if I can repeat this, but it is mission breaking in defense at the very least if it happens.
VISUAL: The thrall was stuck in this position