Hmmm, that's problematic. There's always the 'reboot': get out of the car, lock car, get back in and restart. But this is understandably frustrating.
You've reminded me of another odd behavior (but one that is more likely intended): after I back out of a space, shift into drive, and roll forward, the rear camera operates for ~10 seconds. I find this somewhat distracting. I'd love a front facing camera when I'm trying to navigate tight parking, but a rear-facing camera while moving forward is just odd.