rikmills added a comment.
Seems it is. Unsetting that env var and restarting plasmashell makes it go away. Reversing that again make the ugliness shown there come back. REPOSITORY R120 Plasma Workspace REVISION DETAIL https://phabricator.kde.org/D7257 To: fvogt, #plasma, mart Cc: rikmills, mart, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, lukas