My P3 Pro powers up and gimble does self check OK and stable. While flying, camera begins to roll and return about 1 time every 1.5 to 2 second. video is OK, and tilt works OK. I have done gimbal calibration but no joy.. It will continue to do this oscillating roll after landing and turning off props but with the battery still turned on. Never crashed and just started after sitting idle for a couple months. I welcome any thoughs and ideas..Camera and gimble has been working OK since I bought it.