In my case, I bought a Medusa from the Black Market, waited a few days, and a patrol approached, caught my fleet, demanded a scan. I allowed the scan, they found nothing and said I was clean. At this point, within the same encounter, I have option to open comm link to chat, fight them, or leave. I decided to chat just to see the stock answer they give (communique received on protocol, status confirmed, over... or something). Instead of seeing the boring answer as expected, the patrol redid the scan routine.