Responsive padding/margin not working

Hi team,

In the Advanced columns, when I set a padding or a margin for mobile and tablet different from the desktop one, it never shows on the front end (using dev tools to view mobile version), it only use the desktop padding/margin, so I have to set all the mobile padding and margin manually on my css sheet.

Is this a known issue?

Or maybe it is a conflict on my side.
I can sadly not share with you my website as it is still in development.

Thanks for your insight, cheers!