Yep, certainly sounds like a bug.
You may have to start the chapter again, or you may be able to get away with just loading last checkpoint.
I am doing my second run of the game on Ranger mode and I have not ran into this glitch/bug yet in that area. Try changing what options you are using in the trainer. Super Damage might be causing it.
this seems to be a somewhat common graphic glitch in certain newer games. what fixed it for me(and other similar problems in other games) was setting the graphics to the lowest settings like 800*600 and turning the details to low, maybe even putting the game in windows mode, then starting from the last checkpoint.
And yes, once past the glitch you can put your graphics back to what they were without errors.
hope this helps