I had the Balanced Gun for a few days now and I noticed how annoying the dark atunement proc is because of one issue, half the time it attacks spots where nothing is there/ not even an enemy! The worst place this happens in is Planar Arena because theres 2 spots where the proc targets:
1. An area in front of Seer Hox
2. An area in the spike gate
3. Pools (not just in arena)
Hopefully this extremely frustrating issue gets fixed as soon as possible!