This is old enough content that it's not really a big deal, but starting from around the start of adds phase (it may be sooner, but I don't remember well enough, and I know for sure it's going on during adds), the radar will just show a big cross-shaped zone of bad which never goes away, and it gets really inconsistent about showing any further mechanics. This seems to happen every time. I'll try and get a screenshot the next time I'm in there, if that helps.