demm Plasma 5.15.3 is not in the build repo. You mean this issue started after the Qt 5.12.2 update? Only affects one theme?
demm Don't. I'll rebuild all of Plasma on new Qt & rebuild frameworks. So far I tried to get away with just kwin, clearly not enough.
mendez I checked it anyway 😉 Yes, problem only with new Qt. And looks like just a problem with breeze dark, only.
demm Rebuild might not fix, already reported other places too, example https://bbs.archlinux.org/viewtopic.php?id=244988 But will do a full rebuild anyway, always better.
demm Rebuild did not fix, so I'm afraid it is an issue for breeze dark & new Qt 5.12.2, not a distro/build issue.
demm If you disable composting, issue is gone. Bug report is opened in KDE, please vote for it, so it gets the needed attention: https://bugs.kde.org/show_bug.cgi?id=405548
demm One more update, fix is in review https://phabricator.kde.org/D19821, I won't post any further here now, once the patch lands, plasma-framework will be rebuild.
bvbfan It looks correct patch, Qt's change https://code.qt.io/cgit/qt/qtsvg.git/commit/?h=5.12.2&id=dcc4e2c4d96a6ad1447b9fb679afca21bb381218
demm Patch is not correct/complete, only fixes kicker & notifications, not the tooltips, so not applying until the complete fix has landed in git.