Drox just in purple bubble

Drox has been in the purple bubble for a while.

I tried going out and coming back. Still bubble.



EDIT: After switching to a different character,for some reason he was able to move while still in purple bubble?

The character was able to do a small amount of damage through the bubble after moving Drox, who finally phased after I got him to 25ish percent.

this isn't a bug, drox is a DPS check.

This is a troll fight where it LOOKS like you need to do something to get him out of his 90% damage reduction bubble, but no, you just have to beat on him while he stands there doing nothing except summoning weak adds.