Exporting a proxy reference doesn't export all the nodes, breaks the reference

[jEchoes]

I have a maya reference with a proxy reference attached. It works great in the scene, but when it comes to export the objects, the reference looses the ability to switch between proxies.

Steps

1. Create a reference
2. Group reference
3. Add proxy to reference
4. Select group with reference
5. Export selected
6. New file 
7. Import or Reference exported file

Proxy is frozen its exported state, unable to switch between reference

We have a pipeline where we build an environment with references with added proxy's. Then we export the environment into animation. I would like the ability to switch between proxies downstream in production.

I have tried

• export all
• manually select all nodes attached to the proxy manager, then export selected

I would expect to be able to export nodes and connections.

CratePM, crateproxyRN and crateheroRn are the offending nodes

Thanks