Hello.
I don't know if this is a real issue so I explain my case:

I have a EntityProcessor that have to add some HATEOAS links to a Entity
Case 1: In GetEntites I do:

var
   lEntities: TObjectList<TMacchinaUser>;
...
Renderer.Render(ObjectDict().Add('data', lEntities, RicettaEsplosaLink)) 
// RicettaEsplosaLink is a TMVCSerializationAction

Case 2: In GetEntity I do:

var
   lEntities: TMacchinaUser;
...
Renderer.Render(ObjectDict().Add('data', lEntities, RicettaEsplosaLink)) as for GetEntities
// RicettaEsplosaLink is a TMVCSerializationAction

In second case the rendered JSON is WITHOUT the links.

After some debugging I think I found the "problem". I attach the "MVCFramework.Serializer.JsonDataObjects.pas" with my edit at line 573.

I hope this can help.

Eddy
MVCFramework.Serializer.JsonDataObjects.zip