I see a bunch of issues being reported on the bug tracker that all seem to be related to this issue so I figured I'd bring it up here to spread some more awareness. If your units are unresponsive, if you think you are experiencing lag, etc. check the chronocam to make sure you are caught up with the server. You can fix it by fast forwarding to the "end" then hitting play. This is not a permanent fix but it should solve your lag problems until it gets fixed in the engine.
