icon stroke size bug

I’m experiencing a bug with stroke widths on some icons in my file.

When I duplicate certain icons, their stroke width becomes smaller each time. For example, after duplicating an icon multiple times, the stroke visually keeps getting thinner and thinner.

I can manually correct the stroke width value, but after reloading the file, the stroke width goes back to the previous incorrect value.

The stroke width gets smaller with each duplication, and manual corrections do not persist after a file reload.

This seems to happen only with some icons, not all of them.