Viewer show the xray image (Modality is IO) in black and white by default

The dicom file (Modality is IO) is stored inside orthanc server. When open using OHIF viewer, it shown black and white by default. But when i download the dicom as jpg direct from orthanc server, it look normal. Please refer to figure below

How I can solve it?

Looking forward for your answer.

Thank you very much

Hmm. Yes that should not happen. If possible, could you please send a copy of the anonymized DICOM file(s)?