sorry for my English this problem only happened in another DE (xfce, lxqt, trinity) with kwin5 as the window manager if i click "show desktop" button/widget/applet, all windows minimized (normal behavior) and when i click one of the apps from the taskbar, some of the apps restored from their minimized state (not normal, it should be one apps that i clicked that unminimized) this problem not happen if i use default wm for respective DE (xfwm for xfce, openbox for lxqt, twin for trinity) i even try to use other wm (twin from trinity) in xfce n lxqt, n theres no problem with "show desktop" behavior, so i assume kwin5 need some work
KWin doesn't minimize windows when showing desktop. Instead it just raises the desktop window. Given that this is "by design", I'm not sure whether this's a bug.
expected behavior.