I've been trying out all three lvl 90 talents in heroics for a few days now, and I've noticed a strange behavior with divine star. It seems to break some channeled spells (MF and MS tested so far) when it returns to the caster, which I find makes it irritating to use. I typically use the talents after dots are applied and high priority spells are on CD, so I often follow up with either a flay or a sear, depending on the situation. It seems that my channel is being inturrupted by the star when it returns to me, essentially causing a dead GCD. I tried it with cast time spells, and it doesn't seem to affect them.
Has anyone else noticed this behavior? It doesn't seem intended.