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.
Savegames always help. the before the AI uses the wormhole generator in this case would be useful.