Missing Audio track in resulting export video file

Is there a reason why several of my upscaled videos, which have included an audio track in the source, have exported without/missing an audio track?

My Codec settings have a “Copy” for “Audio Mode”.

3 posts were merged into an existing topic: Presets resetting audio mode to “none”

A post was merged into an existing topic: Presets resetting audio mode to “none”