Abaqus - Black lines on Cutting plane 3D elements ?

Kindly refer to the diagram. It seems that some lines are created inside the elements when I see the output of my model using the cutting plane.....can you tell me the probable reason for it?

After zooming the line, a few lines appear as shown below; kindly guide me regarding the potential issues to be resolved.

Abaqus ​​​​​​​