Has anyone had an issue with the gimbal twitching erratically around upon power-up? I've performed around 30 or so flights with the gimbal, with no issues, but I recently had two successful flights, then went to a city location (which happened to be near light rail lines) and the gimbal with the GoPro attached, flipped out then, went unresponsive. I moved the location and had the same issues. After plugging and unplugging and waiting around 20 minutes, everything seemed to go back to normal and I had a successful flight. Anyone experience something similar OR have an idea of what was going on here? Thanks!