Columns block not stacking on Mobile on Rosa2

If you’re using the Columns block on Rosa2 and notice that the stacking option is not applied on mobile devices, insert the following CSS snippet in Appearance → Customize → Additional CSS:

/* Stack columns on mobile */ 
@media not screen and (min-width: 768px) {  
   .wp-block-columns:not(.is-not-stacked-on-mobile) {   flex-wrap: wrap;  } 
}