Users can not preview the ECL items added within the rich text field. This is creating confusion for the editor. If we can add that functionality that will be nice.
ECL links are not rendered directly in CME (the classic UI) when opening up items with RTF fields containing ECL links. That is done by pressing the 'Load Images' button.
In Experience Space (the new UI in Sites 9.5) this is fully working both with ECL links in RTF fields in normal components and as well in ECL components.
Users can not preview the ECL items added within the rich text field. This is creating confusion for the editor. If we can add that functionality that will be nice.