Or to be more generic, all injected dependencies should have a scope equal or greater than the object they are being injected into. Otherwise the hard reference from the parent object will “widen” the scope of the injected object. Injecting a request-scoped object into a session-scoped object would have the same affect.
Jeff, back to your original question, do the errors seem to happen on any particular part of your site or when you are re-initting, etc or are they completely random?
Thanks!
~Brad