Lately I've been seeing a lot of ships flying in pvp with a 'redirect feedback' buff. It has no art, so uses the default faction icon. It's *NOT* feedback pulse or reverse shield polarity. I've only seen it on KDF ships so far so it might be something they get.
I don't know what it specifically does, but any ship I've seen with that buff on repeatedly flags 'immune' whenever I fire at it.