https://bugs.kde.org/show_bug.cgi?id=430042
--- Comment #1 from Jan Rathmann <jan.rathm...@gmx.de> --- This turns out to be at least partly an hardware issue: I replaced my USB mouse by a different one ~2 months ago, and since then the bug hasn't happened anymore! New mouse: ID 046d:c069 Logitech, Inc. M-U0007 [Corded Mouse M500] Old mouse: ID 1241:1166 Belkin MI-2150 Trust Mouse -- You are receiving this mail because: You are watching all bug changes.