Thank you for your kindness. My right side is still about 25% dead but I can get by nicely on what is left.
I was unaware of the fix you describe, but then I was never one of the "in crowd" nor one for street sweeping unless a mission required it and there was seldom enough other people around at any given spot for it to be an issue. In specific, this was a mission to defeat 50 carnies. I was a level 45 tank and knew a few spots in PI where they occasionally spawned at a low enough level I could take them on. I had spent 20 minutes culling Nemesis, Malta and Rikti before finally getting a mob. I had jumped into their midst and delivered a foot stomp when someone swooped in. I said, "Fine. Take them," and left. And never saw any credit for defeats despite the fact I'm quite sure the foot stomp at least did some minor damage and there was at least one I had close to defeating. Perhaps there is a required minimum percentage of damage? Or perhaps without me present to draw their ire the fellow took an express ride to the hospital. It took another half hour before another mob of carnies spawned for me. So I hope you can understand my... annoyance.
I had a similar incident a few weeks prior with my level 14 controller. (Yes, I am an alt-a-holic.) I had three Council locked down and was very slowly taking them down when a brave scrapper swooped in and finished them. I got XP to reflect the percentage of damage inflicted but no credit for the defeat. So I hope you can see why I would make that assumption. I just think my efforts deserve reward.
I'm soloing occasionally, running radio missions to fill street sweeping mission requirements and limiting my interactions. Keeping myself to myself. Since the consensus seems to be I was wrong about all this I think it best.
Have fun!