The news of free floating UAs in black hole systems is highly significant. At one point yesterday I was thinking about the best way to deliver an Unknown Artefact to Sagittarius A* using a relay of wings (many, many wings) given what we know about their effects on ship systems. However, if one can spawn in Sagittarius A* - or even in another black hole system in the inner Core region - then it will be something very significant indeed.
I remember a long while back that some unexplored systems far beyond the civilised bubble (often tens of thousands of LYs away) had errant signal sources - including one spotted in the Sagittarius A* system itself - that turned out to be a targeting bug in the game. Maybe they weren't that insignificant after all?
I can't speak for the others here, but the best advice I can suggest for you right now is to hang on out there. Maybe see if there are any other black holes or B class electric-blue stars nearby that might have similar signal sources? Also, be careful.