I have a module template for cloneable modules. As part of the template I have an child class implemented for both the Module Admin and the Message Queue. When I try to add a request and wait for reply (or round trip) I get the following issue:

Where the scripting has correctly identified/linked the property node to the tunnel.
Is this a known issue or is there something further I have done which could have caused this?
It's also probably worth noting this only occurs in my MHL the EHL and Helper loops work fine.