I am confused about an error I am seeing when trying to create a containment association between a Device Feature and multiple Assembly features.
"Error: Unable to complete operation., The point feature/object is already content."

Workflow:
- Electric Utility Network Foundation template version 3.4 published to V 10.8.1 Portal.
- A user attempts to Contain a Electric Device : Medium Voltage Switch inside of three Electric Assembly : Medium Voltage Switch Banks
Questions:
- The documentation states that:
A utility network supports nested containment as well as a one-to-many relationship between content and containers.
I can replicate one-to-many behaviour for lines - e.g. containing a duct within multiple trenches. I cannot however do this for point network features, such as containing a device in multiple assemblies (of the same type or otherwise).
Is there a restriction not documented about where one-to-many containment is valid/invalid?