Hi Alireza,
I have just tested it here first without any IngestTranscoding configured on Orthanc side: they both remain in JPEG Baseline and the Photometric stays unchanged (which is expected).
Then, I have configured IngestTranscoding to 1.2.840.10008.1.2.1 and, once ingested into Orthanc, their PhotometricInterpretation is updated to RGB and they still display fine. I have also played with the GDCM plugin configuration but always got the same result.
Could you define your setup and test more in details ?
[EDIT]: note that I realized that I tested with the mainline version which includes this patch related to YBR to RGB conversion.
Best regards,
Alain.