This happened to me intermittently, using red bricks and a battery plate from my R1 package (using 1B-to-2B cable). It occasionally happened even when the brick hadn't been pulled, but knocked/bumped. I attributed the problem to a bad plate or brick connection, but it did cause me to hesitate every time I had to do a battery swap. And yet sometimes it works as it should, camera doesn't skip a beat.



