Not sure if this is known or unknown--or if perhaps I'm missing something--but I have now twice had a ship wormholed by an AI faction. In one case (different game), I wasn't sure if the AI could see me, so I didn't report it.
This time, I was wormholed and cleared the FOW--no enemy ships within even my travel range. I don't believe any of the AI had both the FOW clearing artifact and the wormhole generating one... so I'm not sure what's up. I highly doubt they could see any of my space through FOW. I suspect they can see through FOW when using the wormhole generator.
Not sure how much it would help, but I have an autosave from before and a save from after--doubt it would reproduce. Let me know if those saves would be helpful, and, if so, I'll upload them.