Exported video includes brief audio repeat at end

I'm using Premiere Rush on my iPhone 15 Pro. Here are the steps that led to this problem:

• Create a project.
• Add video as source.
• Trim and add fade/black transition effect.
• Check playback in Rush and it's perfect.
• Export to 1080p, matching framerate. Completes successfully, no errors.
• The end of the exported video repeats about the last 1/4 to maybe 1/3 second of audio.

Once this happened, I went back and looked at some other videos I've made with the same workflow and some of them have the problem, but not all. Some videos used 1080p30fps HEVC source, some used 4K30fps HEVC source. This sucks because I otherwise like this app - I use Premiere Pro and this app seemed like a handy way to do quick edits with a familiar interface and posting on social media while in the field. Trim to find a good segment, fade in, fade out. Capcut or even iMovie can handle that without messing it up. 

I've attached an example where it happens.