Steps to Reproduce

run the attached example
click the save button (multiple times)

Current Result

the collection BinderImpl._formAssociatedSaveBindings is growing, containing SavePropertBindings to detached componets

-> causing memory leak
(NPEs in more specific cases)

Expected Result

bindings of detached components should be removed

Debug Information

The binding is added for the outerVM but attempted to remove from the innerVM
-> leaving the stale reference on the outer binder

Workaround