You can send vca to the same vca (this make a bucle and crash when you try to delete )
You mean an infinte loop (bucle infinito)?
yes, and if you click to dectivate, hangs nuendo.
My workaround: reset computer (w11) , open project, delete track, and create new vca and reasign tracks again.
To reproduce i drag a track to the vca (like moving track in other daws) but there, for some reason nuendo copy the vca assign (i can not reproduce again right now)