vescXR surges and nose dives on uphills

Hi all, I’ve been running my Focr3.1 for years now on HC motor with no issues but lately during chunky rides the nose starts hunting and surges like crazy. Zero issues downhill, always issues on uphills and worse if there’s lots of chunk and bumps.
terrain - trails (rocks and roots)
speed - sub 25kph uphills
accelerating or braking? - climbing hills
did you go uphill/downhill? Uphills
your weight - 200lbs
battery voltage / battery type - 75.6V p45b cells on HC motor.

I’ve tried all the tuning options, gone to refloat and back to float thinking maybe it was the new refloat mohoney settings causing noise

Put my settings the same as a buddies GTv kit for comparison at XR HC motor settings at 120/-100 for max amps

Any help would be appreciated, next and last step is to redo my IMU calibrations.

Thanks