Anybody ever seen this.   It appears on both of my DJI FPVs.   It gets progressively worse as I fly more (3 batteries) today was 91 deg,  but I've seen it when it's not hot (70s).   I've calibrated the RC.   I've reported it to DJI and sent them this video, and the flight log file.   

Hello there BarnSwallow. I am sorry for the trouble this has caused and thank you for reaching out. may we please know before having this issue did your DJI FPV had any hard landing or a crash before? In addition it is good to know that you have already contacted our DJI Support Team for further assistance with regards to this matter. Kindly please rest assured that we will do our best to help and will give out the best resolution for this issue. Again, I am sorry and thank you.

Hi Stephen.   First flight of this drone.    I suspect it's the controller, as it occurs on my other DJI FPV as well.      Recalibration of controller had no effect.   Seems to get worse as I fly it more.