Swapped EVA -> RatRig toolhead and massive resonance spike

I swapped my eva toolhead to a ratrig toolhead recently and changed from an lgx lite to an orbiter v2.

During the recalibration process i started noticing that a few of the frequencies had really bad resonance at double the oscillating frequency.

Most of the frequencies were fine, but oscilating at 90hz for example, I get a really bad resonance at 180hz.

Any thoughts on this?