@Mangelschots My personal experience: it happens sometimes, not all the time. When it does happen, I have noticed that the phone display is stuck too, and the AA screen is reflecting what the phone has. To get going again, I turn the AA screen off, reboot the phone (just closing the MRA app isn't enough) then restart MRA and turn on the AA display.
I suppose that clearing memory and cache without rebooting may be enough but, given that I am stopped on the side of the road when trying to fix this, I just do the reboot.
Vinnie