ngraham added a comment.
Looks to me that scaling is working just fine for system tray items in your screenshot. It's deliberate that they have that much padding on the top and bottom (at least with the default size settings). REPOSITORY R120 Plasma Workspace REVISION DETAIL https://phabricator.kde.org/D23350 To: xshram, ngraham Cc: ngraham, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart