I had a weird thing happen to me today I have never experienced before. I was flying a mission with no issues and returned to home to change to a fresh battery. When I went to launch again I could take off but was unable to move in any direction. After fiddling around, rebooting and looking for an answer I stumbled upon something about an IBU calibration error. After one failed attempt to re-calibrate I rebboted again and was able to complete the calibration sequence and go back to flying. I am curious if anyone else has seen this happen.