Is this guy bugged or is there some mechanic I'm not aware of? The last couple times I've run it, both this week, he hasn't telegraphed his beam with the big red light over the target. Party members confirmed that it wasn't showing up for them either.

In the two runs, 5 tries (3 wipes), the red light showed up once, out of a total of 15-20 of the times the attack was used.