Audio2face with metahuman in unreal engine5.3 audio problem


I’m a Computer Science student and I’ve recently started working with Unreal Engine and NVIDIA Audio2Face. I’ve encountered an issue that I hope you can help me with.

When I hit the ‘Play’ button in the Unreal editor, the audio from Audio2Face is successfully transmitted to the MetaHuman and plays as expected. However, if I stop the playback by pressing ‘EndPlay’ and then start it again by pressing ‘Play’, the audio no longer plays through the MetaHuman. The audio only comes out of the Audio2Face app, while the facial animations continue to work fine.

Could you please guide me on how to resolve this issue with the audio? Any help would be greatly appreciated. Thank you for your time and consideration.