Inconsistent Audio Volume Handling for Video Audio in Storyline

I've seen other (two year old) posts that mention this problem but haven't seen further discussion or a posted resolution.

I'm experiencing a consistent issue with how Storyline handles audio in videos compared to standalone audio files. When I import a .wav narration, it defaults to Medium volume, which I can adjust as needed. However, when I add a video with embedded audio—such as an .mp4 produced in Camtasia—Storyline doesn't apply the same volume setting, and the audio plays back at a noticeably different level.

Even though all my audio is normalized and balanced externally in Audacity before import, the difference in volume and character is obvious once in Storyline. Separating audio from video restores volume control but makes timeline and trigger management more complex.

I can't provide a sample file due to corporate policy, but the problem is easy to duplicate:

1. Record a short instance of audio (Audacity, Audition, etc.)
2. Export to .wav
3. Import the .wav into a video editing application (Camtasia, Premiere, etc.), add visual content, and export to .mp4
4. Import the video into Storyline on slide 1
5. Import the .wav from Step 2 above to slide 2.

It would be very helpful if Storyline allowed video audio to use the same volume settings as standalone audio, or at least provided a similar control.