Invisible Garuda after a while

Not sure if its lagg or anything but prior to the patch I didnt have this problem where Garuda (hard mode specifically) went invisible after her two adds spawn. Once we, the party finished killing Red thread add, she went invisible on my screen. However if she teleports anywhere (For example teleporting outside to respawn adds) She'll show up on my screen again. Pretty sure its not a Graphics problem for me since I've been running Hard mode ever since and had yet to have problems until now. I don't know if its lag but im guessing its not because while this is happening everyone around are attacking her just fine. If i was lagging everyone would be frozen on my screen.

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