Awakener lvl 8 sirus visual bug

The other day when I was doing awakener lvl 8 sirus on xbox hardcore league during the final phase he went full on invisible.
Did a meteor circle where not only was he invisible the walls were invisible and there where no indications where the exits were

I logged out loaded back into the fight where he was still invisible.
The walls to the circle broke and after a couple attacks he appeared again.

Was able to finish the fight never got to record it but it was sketchy