Great, thanks for the test results. I don't know why the Pinball radius is being ignored.
If in the cylinder on plate model, you go back to SpaceClaim and on the Workbench tab, click the Share Button, the circle will imprint on the plate, then you can go back to Mechancial, delete the contact and see the benefits of Shared Topology, which I prefer over Bonded Contact.
For others reading, here is another good discussion about this topic.
You are navigating away from the AIS Discovery experience