Ok, just a follow-up in case others are going to search for the same issue sometime: I had the Pineapple connected to a laptop with the admin interface accessed via USB. If I close that browser window shortly after its hooked up on C2, it doesn't get disconnected again. I haven't looked further into why this happens, but it looks like there is something running in the browser admin page that eventually will cause C2 to lose connection again. My bet is on a javascript process messing thing