Object Class function properties in Flows

Hi,

We moved an action from a Service to a Flow.

A function property on the Object Class (fullName) which we were using in the Service resolves to undefined in the Flow (in our case: Send Email action node).

Two questions:

  1. Do I interprete it correctly that Object Class function properties are not evaluated server-side when records are loaded into an action data source in Flows?
  2. If they are not supported, why are they selectable in the data binding picker inside Flow actions?

Thanks!