My screenshot is how it os supposed to display on mobile White bubble around the categories vs a white column pane.
As I reported here and was fixed.
It was partially broken before creating the white wrapped column.
I am sure Jordon might provide some css code possibly to restore the bug if you prefer the white column. Mobile now for me matches mobile.
**EDiT: Looking at Op post you might be right. But the fix imho looks better as it flows properly with background. Perhaps Jordon can add a toggle for desired effect.
I have to locate the fix so my modified Air Lite theme matches. By like rhe Topic excerpts js was removed as it was excerpting all topics instead of just pinned topics.
I added Topic excerpts theme component to put excerpts in categories I want to have it. Unfortunately though it did not restore the pinned topics excerpts but many users wanted a default listing style for more posts per screen.