It is fixed upstream in KDE bug #338622. https://bugs.kde.org/show_bug.cgi?id=338622
Hi, 4.14.2 ebuild already doesn't apply the patch - or am I missing something?
Ouch! I am sorry. I downloaded the whole GIT kde-master.zip file from https://github.com/gentoo/kde yesterday or the day before yesterday and not checked changes :-(. On web the file is nine days old and not contains the patch. I do not understand where I got it with the patch enabled.
No worries, and thanks for flying Gentoo KDE!