Sometimes, in all places that weapons can be used, the shield stops working.
I know this probably isn't a new problem, but I was doing a JK round with a friend, and we got absolutely...by a Giant lichen colony because we had no shields. We died 3 times as many times as normal in the rest of the stage because we couldn't shield. And it has nothing to do with our skill. I constantly solo the JK rounds (except JK himself so far) and can do it fairly easily without dying.
I'm not sure how this works but it can get really annoying. Fortunately it was fixed after that stage, but it would be appreciated if it could stay fixed.
It mainly occurs when players try to use the level looping exploit. So whoever started that party was doing something they shouldn't had.