Lambent Bezerker Horde Glitch?

Has anyone else encountered this? It's happened to me in two maps, Thrashball and Overpass. After starting to leak immulsion, the 'zerker catches on a wall, mid-step, and starts glitch about a quarter of a step, back and forth. Walking into it will still cause me to go down, and it seems like the 'zerker is still taking damage, but I haven't killed it, even after unloading every bullet on the map into it's inner rib cage. Any ideas, or even fixes from Epic?

My friends and I had this same issue, but we adventually killed it.. It took a well placed torque bow shot when it's chest opened. Seemed to be more effective then anything else.

Yeah you basically have to either shoot it on it's chest when it opens up which takes ages or use a like a torque bow, boomshot, etc when it's chest opens up too.