Not that i am aware of, as i did survey the whole system, and have been shipping in infrastructure, with 0 contacts.
The danger value has now dropped down to 1096, and i still have value of 16. However the text color changed from red to white, so maybe its a visual bug and it has ppv of 1600 but it is only showing 16 (which would be around the ppv of all the ships in the system)