“Realized Information Flows” on Connectors are not being displayed on the IBD.

[SRousselle]

The problem:
“Realized Information Flows” on Connectors are not being displayed on the IBD.
 
Context:
In a BDD, we have created Item Flows between Block Classifiers.
In an IBD, we use Connectors between Properties (Block Parts). We show Item Flow by selecting the Connector and selecting the Item Flow using Advanced -> Information Flows Realized. This worked correctly.
The problem does not present itself during the creation of an IBD but occurs when the IBD is closed and then reloaded.
 
Our model is hosted on a server. We are using "Load on Demand". The "Pre-load entire mode" isn't available.
We are using EA 15.2. We've noticed this problem on EA 14.1 as well.
 
What we see when the problem is present:
When the IBD with previously selected “Information Flows” is opened, the Connectors do not show any labels.
Right-click on a connector, select "Advanced" -> "Information flow Realized". The Information Flow Realized Window is empty as if no items were ever selected.

Workaround:
For both Parts/Properties associated by a connector, Right-click, select "Find" -> "In Project Browser". Then right-click, select "Find" -> "Locate Property Type in Project Browser".
Reload the IBD.
The Item flow will now be visible on the Connector between these exact two Parts/Properties. You need to do the same for all remaining Connectors. With many connectors in an IBD, this is not a practical workaround.
 
My question is:
Has anyone ever observed this problem/issue? Am I possibly missing a setting?