If you wipe on Ony during the third phase, she stays in that phase, casting spells meant for phase 3 in phase 1.
This is a "minor" bug, but it's annoying having to reset the raid and clear the trash each time you wipe. She's supposed to reset but doesn't.
I've only tried the 10m, so i don't know if it's the same on 25m.
Neltharion.