Normally this is caused by a combination of the following issues:

Infill patterns that cross already drawn infill lines (e.g. grid) are inconsistent with high print velocities. Use patterns like Cross Hatch, Gyroid or Honeycomb instead. Patterns like Cross Hatch offer a good balance of strength and speed along with requiring less infill density (%) than other patterns to achieve the same coverage.

• Tune Extruder Rotational Distance
• Tune flow ratio (see Orca Calibration)
• Tune Pressure Advance (see Orca Calibration)

A poor gcode z offset results in poor bed and layer adhesion and can cause the part to separate or move on the plate, resulting in the part shifting to getting knocked off the plate.

Properly set z_offset

see aligning the gantry

The N4 is a bed slinger and the movement of the bed can cause the part to wobble in position as it moves which can cause part knocks. Aside from better supporting the object, slowing down the Y axis movement is can mitigate the issue, which often just means slowing down the entire print, though first slow down fast travel moves. Sometimes this can be improved simply by moving the angle of the part on the plate to reduce the need for Y axis movement.

• Avoid crossing perimeters
• Retract between layers and enable z hop on retraction