In fact it loaded the video clip (MP4), not just the audio track. It shows it as an audio clip because it’s on an audio track. Can you be sure you didn’t inadvertently move that clip there at one point before saving and closing Shotcut?
Since it is the video clip (on the wrong track) just move it on the video track above. No need to drag the original clip again an re-edit it.
Yes, I can confirm that I didn’t inadvertently move the clip. It happens in areas of the project that I hadn’t touched or even reviewed in a while. I’m not even near it to know that it’s missing. It’s not until I export it and review the processed video that I question why the video went black.
This is the first time it’s even shown anything, including in the audio track. Typically it has nothing at all and I haven’t found a way to restore.
I don’t have other suggestions for now. This is a very particular problem. I don’t remember anyone else reporting something similar. I hope someone else comes up with more ideas. In the meantime, please tell what version of Shotcut you use and what is your operating system.