Mouse is jerky in vertical direction

[Warpshock]

Mouse (trackpad) seems to smoothly track left and right however it doesn't move vertically except for the occasional large jump, any only then when I move the cursor perfectly vertically.

I am using the Logitech Harmony Smart Keyboard (Bluetooth versions of the K400) on an Xbox One X. The mouse cursor works find when pair with other devices and wired mice work fine with the Xbox.

P.S. Thank you for building this!