Hello, is there any way to map response for Service-REST to JSON with correct data types, but without pxObjClass?

Current behaviour for Service-REST:

Situation 1:

Map from: JSON, Use fast processing: No, Map from key: .response_GET

Result: pxObjClass is absent in the reponse (good), Pega DateTime properties were not converted to ISO format (bad)

Situation 2:

Map from: JSON, Use fast processing: Yes, Map from key: .response_GET

Result: pxObjClass is in the reponse (bad), Pega DateTime properties was converted to ISO format (good)

Please don't propose any sollutions including replace by regexp or using any other functions converting a clipboard page to JSON string line. I need working Map from: JSON sollution.

***Edited by Moderator Kayla to update Platform Capability tags****