Created attachment 110753 [details] GTK Scrollbar (Firefox) On KDE Neon, there is some weird spacing on the top and bottom parts of the scrollbar in GTK programs. Also, there are stepper buttons being shown, even if those buttons have been disabled for the Breeze theme through Settings > Widget Style > Scrollbars.
Created attachment 111306 [details] Scrollbar in nautilus I also noticed this after 5.12 update.
*** Bug 396284 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 396091 ***