Love the addon, and it seems to be perfectly functional in its intended way.
I have found, however, that the window seems to sometimes open up multiple times and "overlap".
It's not a major issue, and they do close together with the blizz group finder UI, but it can be a bit tedious to sometimes have to close the window 4-5 times if I don't want it open.

I don't know what causes this to happen, and I'm unsure if it could be an issue with ElvUI, but I haven't experienced it with any other addons that are also reskinned by ElvUI (TSM, Auctionator, Details, etc.).

But as mentioned, it's not a big issue and doesn't decrease functionality