Eh, it's not all the time. But often enough that I noticed it.
Change of topic: I'm primarily a solo player, and so far I've found that the Storm is the best for it, at least in the lower levels. Freeze then nuke. Freeze then melee. Freeze then headshot. The dodge is super good for getting behind cover. The ultimate just wipes the board of enemies. Been clearing everything on Hard difficulty with very little trouble.
Reached level 8 and I tried the colossus again. And was disappointed....again. Not sure how much that will change in later levels, especially with no energy shield to regen behind cover.
What are your thoughts?