So lately after the last patch and some leveling I have noticed two things. The blade dancer sub class is what I have been using and I only play pve at the moment. The enemies I face the most so it seems to occur with them the most are fallen and vex. Im not sure if anything else is not working but the arc grenade and the stab and turn invisible ability seem to be hit and miss, and I was wondering if I am the only one experiencing this. For the arc grenade although I dislike its delay I take that into account when ever used. But recently it fails to go after the near by enemies, it will chain enemies visually but some are not being damaged and it refuses to chain nearby enemies when its started to chain off two or three. I will see the arc hit one to three or more but he third or above seem to not get hurt, or the first two wont and the third will. This happens wih Goblins, harpy and fallen it seems. As for when I hit someone and turn invisible, mostly just with fallen and rarely hive. They still can see me, they will aggresivly melee me, fire the homing weapons or the snipers will still track and fire at me. This has caused to many close calls and I have yet to lose invis as the visual aid is still in affect. The fallen and hive with yellow life bars tend to do so the most but even lesser ones have.