New erratic behavior

[DucktileMedia]

My rig has flown pretty well up until yesterday. No software changes and no crashes, not even a hard landing. But all of the sudden it has been acting weird. The camera gimbal (av130) is now way off level when I add cyclic correction. When I hand hold the unit the gimbal works perfectly and always returns to level. I am flying in NO wind and I am correcting way too much to one side all of the sudden. Any ideas on what would cause this erratic behavior without changes of any kind?

Thanks

I am using Xaircraft for the FC. Not for long but it has worked fine so far.

Avrotos, 12x3.8 slow fly.
Maytech 30a

3s 5500

Av130
Sony Nex5n