Actionbuttons vanish!

[Hellemose]

I just experienced today in Draktharon Keep on my alt, that at last boss when you get turned into a skeleton the actionbar/buttons for that phase are gone, the bar itself is there but no buttons, and they keep being gone after the encounter.

havent experienced it before and i have been using nUI+ for quite a while.

i have checked that im not by mistake are shifting the bar's so i know its not that