Hi Elliot, we're sorry for the delay.
This kind of issue is often related to the Y-axis lead screw or coupling on the near side. If the spindle feels loose, it’s worth checking that the lead screw is properly secured in the flexible coupling and that the bearings and mounting points are tightened correctly.
We’d also recommend ensuring both Y-axis motors are wired and configured correctly, as they should move in sync rather than one pulling the other.
If you are still having this issue, please contact our technical support team via https://ooznest.co.uk/help/.
Hope that helps!