Cutting superimposed layers failing

I am cutting a multilayer, superimposed shape. The cut preview display panel in easel shows the correct picture, however when cutting it ignores layers and cuts the shape out through each layer down to the bottom layer without leaving behind the 3d topography. I have cut this for several weeks with no issue, but now it cuts several layers deep and then begins removing the higher elevations. I have rebuilt the easel file, but am still having the issue.

Can you share the project?

Also, is your Z losing steps? Check your Z axis pulley.