in my project it happens after I copieed an existing mesh operation for reuse with another geometrie. Nothing was changed at the mesh operation tree only the geometry was exchanged which was nearly in same dimension as the geometry I used before. I got the message to the wrong material point position when I tried to save the changes in mesh operation.
But parallel to that I got another problem with SimScale GUI in browser when trying to work with my new geometry which was more detailed than my dummy geometry which I used before in simulation tests. My browser becomes frozen when I tried to work with the geometry. But this problem I have posted in another forum point.
Unfortunately I can´t share a link to the project for the reason I used a CAD geometry from a real but older project.