System: Kubuntu 20.04 (beta) 64bits KDE/Plasma 5.18.3 I have installed Kubuntu 20.04 pre beta a couple of months ago (upgrading it from Kubuntu 18.04). Keyboard shortcuts configured from "KDE menu editor" worked about a month ago. I think from some Kubuntu update about a month ago, new keyboard shortcuts configured from "KDE menu editor" don't work (old shortcuts configured from "KDE menu editor" still work).
*** This bug has been marked as a duplicate of bug 417495 ***