I currently can't reproduce this but: - headers in the context menu sometimes black out, the outlines and background box disappear and its transparent - lines and the box surrounding are sometimes disappearing (the white box around the elements went disappearing in parts, not fully but top right top and top right side and so on - it seems there is some kind of corruption where the seperator lines are, the areas disappear or are handled differently https://cloud.uol.de/s/i2Pm4oQD5qnEJ6S
Here is a video of another bug but same context menu. https://cloud.uol.de/s/xN5szTxwJCYkrWL password: kdebugs123 So it affects the context menu in the panel and application launcher
*** This bug has been marked as a duplicate of bug 432264 ***