On my last run of VoG we three phased Atheon. During all three phases nobody ended up getting detained. Also nobody died during damage phase so the detainee dying isn't a possible reason. The fireteam I completed it with had two ideas as to why it happened: 1. The Thundercrash Titan hit him at the perfect time when his arm was raised to stun him out of the imminent detain. 2. Whoever held the relic would cleanse to block damage but also use the relic super. Maybe that could stun him out of the imminent detain. Another 2 small ideas is it was just a glitch and we got lucky or making him stomp at the right time prevents the detain mechanic since it's timed. Whether it's luck or it is possible to consistently do I'm curious if anyone else has this happen.