I had this two times.. while tilting the camera upwards. The error came up then wnet away as soon I relelased the rocker. I dont think its the controllers fault. It must be some software bug.
Quality was very good, but if there is sunshine then it produces strange effects sometimes. :)
Eventually the only time I flew with the bubble is was to rule out the jello issues I was having.
It helped me in lower temperatures. (-5 C) Kept the gimbal rubber warm. Without it I had jello issues. Above +5C I don't need it, and it is not recommended like mentioned above.