The factory backup camera in my 2011 BMW X3 is freaking weird. Sometimes it works just fine. Most of the time it does not turn on at all in reverse- Not a black screen or anything, the system just doesn't seem to know I'm in reverse. The weirdest symptom is that sometimes it works just fine in reverse, but then stays on for several minutes driving forward even at speed, which is very distracting! Any advice!? Thanks