Irminsul in Void Ark not showing debuff

[EvinnaReed]

ISP: Verizon
Type of Internet Connection: Broadband
Date & Time: 2/9/17 around 9:30PM EST
Frequency: Always
World: Goblin
Character Name: Evinna Reed
Retainer Name: None
NPC Name: None
Monster Name: None
Class/Level: Lvl 60 WHM

I was just in Void Ark and the second boss Irminsul did not show the debuff it had whether it was immune to magic or ranged. The Sawtooth did show it was immune to ranged, but the tree did not show any immunity whether I focus targeted it or attack targeted it. I tested and it was immune to magic, but it was not showing on its bar.

Edit: Just went back into void ark and it did it again, Irminsul did not show debuff even though Sawtooth did. this time it was immune to ranged.

[Powe]

O this happened to me, I think the group burned it so much it that it glitches lol