Duplicate by option + drag

[861475_VctSt]

VS 1.2.005 Mac Intel
macOS Catalina 10.15.7
MacBookAir5,2 (13-inch, Mid 2012)

If you duplicate a shape by option + drag. Some of its attributes cannot be changed.
For example, if you duplicate a rectangle and try to change its paint, you will not be able to do so.
If you duplicate a shape using Tramsform or Edit>Duplicate, you can.
If you duplicate a text frame in the same way, the behavior is even more puzzling.
If I change the font of the duplicate, it changes the font of the source.

Is my VS broken or is there a setting for that somewhere?

[b77]

@861475_VctSt No changes were made in Settings > Modifier Keys?
Still happens if you click 'Restore keys' there?

[VectorStyler]

@861475_VctSt What is the "Duplicate Mode" setting in Settings -> Nudging ?

[861475_VctSt]

@VectorStyler

Thanks.

I was able to solve it.
Settings > Nudgig was set to Reference.
I may have unintentionally changed it sometime ago.