Ok, to clarify is this seen mainly during application initialization or during calls (run-time)?
It should be ok to have everything asynchronous. I don't recall if there is any similar known issues in that build for this. What is the programming model used in this case, single or mutli-threaded? If the latter, do you have worker threads for event processing? If so, what is the ratio of thread to channels?
Just trying to seem if anything in the app design could cause a bottleneck at layer below or now. Did you see this type of behavior at all on an earlier SU?
Jeff