Window manager related shortcuts (raise/lower, maximize/minimize, desktop and window switching and else) are handled by their configuration and not by lxqt-globalkeys. Therefore conflicts are possible, some of them will be notified at session startup. Avoiding identical shortcuts is recommended.
Note: Assigning Super_L (“Windows” or “Meta” key) for opening the main menu in the panel or switching keyboard layout disables the use of this key as a modifier, disabling eventually some of the default keybindings in the window manager in use.