Huge Slip/Jump during cutting

[WillAdams (William Adams (Carbide 3D))]

answered at:

Bad scratch and terrible results

That slip is most likely mechanical due to the difficulties of slotting — add geometry and cut as a pocket to the deepest depth which is appropriate for your toolpath setup: https://community.carbide3d.com/t/adding-geometry-to-cut-as-a-pocket-with-a-finishing-pass/9993