I recently had to work on an existing project designed on a Desktop first setup in Bricks. However, it was built on the standard 1280px desktop width, and the client wished to change this to 1920px.
I don’t know if this is a bug, but you can’t copy the styles from 1280px and paste to 1920px breakpoint. Thinking of this option, I tried to do this with other breakpoints. The copy and paste styles feature only works in a single direction of the cascade of breakpoints.
Unfortunately, this functionality is not yet available natively—however, there are third-party plugins (such as AT) that have included this feature for quite some time.