I am working with an electric utility network, which has topology enabled. I have created a feature template for Electric Line, which includes containment of Electric Edge Objects. The feature template was created through a direct database connection, before publishing (example below):

The feature template appears in the feature service after publishing. However, the "Containment" has disappeared from the feature template. When creating a new electric line feature from this template, no edge objects are created either (see below).

I searched through the known bugs for both enterprise and ArcGIS Pro, but have not found this mentioned anywhere yet. Am I missing a setting somewhere when publishing, or is this a legitimate bug?
I am running ArcGIS Pro 2.9.10 along with Enterprise 10.9.1.