Just after the publication of firmware updates for G80, the Camerajabber installed it in their camera and came with no much better result.
The result showed no much improvement on fixing the IS issue on the lenses and it didn’t solve the problem 100% related to the visible recoil or bounce-back effect that happens in video mode when panning the camera.
Hence, CameraJabber comes with the report as mentioned below:-
The firmware update was to correct the visible recoil or bounce-back effect that happens in video mode when panning the camera. I’ve now shot more video with the camera and there is an improvement with the updated 12-60mm kit lens and at common video panning speeds many would struggle to spot it. However, as you can see from the video above, the problem persists with the Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 lens. The narrow angle of view of this lens makes any movement much more obvious.