Grelleth Bugged?

Were in the middle of doing Grelleth and she isnt letting us cast any form of damaging spell, we can debuff her, the only damage we can do is via melee. it says shes protected from the effects etc, see the SS. Also she never called for any tank switches. ( Which we didn't mind to much ;] )

Looks like you're not alone in seeing something odd.
https://forums.station.sony.com/eq/index.php?threads/issues-with-grelleth-raid-post-8-20-patch.213107/
Did you submit a petition?

As Feradach mentioned, we saw *exactly* the same thing. Going to post this as a confirmed bug now.

Pretty sure she has always had that. Issue sounds more like its not dropping when it should.

The mission is affected as well? The shield that is used when Grelleth's hp is locked now stays on after her hp unlocks. I can confirm it happening in the raid after the 8/20 patch.