Anyone know why custom collections don't seem to work in the Renderpass Node? Is that a bug, am I missing something, or is this a "feature" (collections within collections)?

Often in large scenes we use collections in lighting to create complex groups of prims. It would be useful to pass those into various render passes, but although they show up in some of the drop down menus once created, they don't seem to do anything.

Any suggestions?

This worked fine in my simple test case. Perhaps you could post a hip file that demonstrates the problem?