Using API to create a photo avatar with motion - not consistent with web interface

I created a photo-based avatar and added motion using the HeyGen API but the result is not consistent with taking the same photo, uploading it to the HeyGen web interface, and adding motion to the photo (selecting the Consistent mode and not providing any input for the prompt). With the API, the photo avatar looks occasionally to the left. That is not the case with the avatar created via the web interface. Do you know what is going on?

I can share the 2 examples if needed.