When you give RBAC on Document Spaces ressources and then want to choose a specific space the list shows only the name. It very confusing when you have several branches wich have same names subspaces.
It may be a solution to give the site plan or to specify the path on each ressource.
See to add a flag "RBAC Managed space" to reduce the number of items in the list.
Add also a path of the space.