virt-manager connect to console button

Hi, tumbleweed, since some updates i have in only one of my virtual machines (virt-manager+qemu) when i double click in virt-manager, a empty window and in the middle of the window is a button (free translated from german): "connect to console" "verbinden mit Konsole" when i click on this button, the screen of the virtual machine is there and all is fine. question is, why only at one machine, and where could i disable this function? -- www.becherer.de