Networking breaks 2D physics collisions

So after a ton of somewhat heartbreaking testing I seem to have come to the conclusion that networking appears to break 2D physics in unity 5.5. Or possibly that rigidbody2D objects that contain a NetworkIdentity are not able to collide with objects that do not contain a network identity? Either way no collision messages appear to be sent and no objects seem to collide with one another once a "host" has been established. This pretty much breaks everything that I'm working on so I'm currently in the process of rolling back. Is this some manner of expected undocumented behavior related to the new physics2D improvements or is the new system simply bugged for use over the network?