The button to add a graph to a KSC report doesn't work

On the resource graphs page (the one on which you can see several graph for different kind of resources at the same time), the button for adding a graph to an existing KSC report works only for node-level resources, but it doesn't work for any interface or generic-index resource.

Although, if you click on the binocular icon for particular graph (associated with an interface or generic-index resource), and then try to add it to a KSC it works.

Interestingly, if you choose multiple resources excluding the node-level resource, the UI works, but only for the first resource.