c++ segmentation_demo is not functional

c++ version of segmentation_demo does not produce segmentation mask. Mask is data is always all 0.
python version with same model and input file produces proper segmentation mask.

using OpenVINO [2024.5](version: 2024.5.0)
model: public\deeplabv3\PF16\deeplavv3.xml
input: video\head-pose-face-detection-male.mp4