When starting a new part; custom properties change with initial save

I work with Solidworks 2023. I start a new part, I apply the material, the custom properties update to the material and weight, but when I save the part, the custom properties change and the material and weight is not displayed correctly anymore.

What can I do to solve this?

 

  1. I make a new part.
    • custom properties when starting:

  2. I draw the part.
  3. I apply material
    • Custom properties after applying material, but before saving:

4. Save the part.

  • Custom properties after saving: