In >mate-applet-brisk-menu_0.5.0-1_amd64.deb< is a bug.
If you are opening "edit menue" = "mozo" from brisk-menue it disappears itself in mate-panel, so you have to restart mate-panel or use
>mate-applet-brisk-menu_0.4.5-1_amd64.deb< ,which is working fine.
Maybe someone of you is using mate too.