This happens randomly. Whenever someone is about to get resurrected, you will see the green incoming color on the name as default afaik. When the player is resurrected, that green color stays on that name. There's only one way to get rid of it, and that's to restart the game completely. Tried to go in/out options to "reset" the options. Tried to load other profiles. Tried to reload UI.
This is not a big problem but quite annoying whenever it happens, and it happens alot. I can only guess when it happens, and it might have something to do with the fact that I am about to resurrect someone at the same time as someone else does it. Battle-ressing just as normal ressing out of combat. Happens on both.