Hopefully squashed an unexpected bug in my #FreeCAD macro Mesh_to_Solid. Thanks to @LovesTha for pointing it out.

https://codeberg.org/chrishuck/Mesh_to_Solid

Mesh_to_Solid

This is a macro to automate conversion of imported mesh objects into solid shapes for further modification

Codeberg.org
@chrishuck Worked for me now. I marked the issue closed :)