Zoom original sound not working

I have the same issue.  Voice audio is OK  and we hear the first note of a musical instrument but none after that.  This seems to be an ongoing issue with Zoom since May,

If your flute sound isn’t audible during live sessions, even with Original Sound enabled:

1. Use a condenser mic for better sound capture.
2. Increase microphone input gain.
3. Disable or lower noise suppression in your app.
4. Test your setup with another device or platform.
5. Use an audio interface for improved sound quality.

Ensure all settings prioritize unfiltered audio capture.