Jordas Golem - Broken/Nonresponding Boss

[Thanderan]

Whenever I play Jordas Golem Assassinate and get to the Archwing part, the Jordas Golem just stops moving after about 15 seconds and starts slowly drifting into one direction, ignoring terrain and even drifting out of bounds. I can still damage him and win the Mission, but there are no smaller enemies spawning and those that have spawned are frozen in place, don't attack but are attackable.

I played it on public but alone. With Revenant and an Odonata/Imperator/Veritux set.

[Scorch67]

I had this too, when I did public alone. The first time I did it the Golem drifted through other objects and completely out of bounds until it was gone and not even a way-point was visible.  Everything was still damageable until the Golem drifted out of bounds.