Sometimes barrier between Viggie's Lamps just isn't drawn. I know it works, because I receive buff from it, while enemies receive debuff. I just can't see it and tell at glance if it's on.
Step by step of the bug
Step 1
Pick Viggie
Step 2
Maybe play multiplayer
Step 3
Use you active ability during a run
Step 4
Maybe stop and resume multiplayer session
Step 5
Eventually run into this problem and all other visual bugs, like stuck particles and no area damage
Sometimes barrier between Viggie's Lamps just isn't drawn. I know it works, because I receive buff from it, while enemies receive debuff. I just can't see it and tell at glance if it's on.