Hi! If you have not yet updated to most recent Qt 5.15.8+dfsg-6 and are still on 5.15.8+dfsg-3 or something like that, I suggest you postpone the upgrade.
There are issues with Plasma with most recent Qt 5.15.8+dfsg-6. I am aware of the following two: 1) Screen cannot be locked. After locking screen desktop is basically frozen but still shown. 2) Krunner segfaults, thus neither Alt-Space and in case still configure Alt-F2 will work. There may be other issues. Debian Qt/KDE Team is aware of it. No need to report it. I do not know any further details and the version number for the last working version above is just a rough bet. Thanks, -- Martin
