"Remove GPX Import" not working

I’m trying to import some old GPX files, and I ran into a problem. After using Claude to clean up some noisy data, I imported one of the files into Arc, but the imported data doesn’t look correct. I then tried to remove it, but it won’t go away.

I’m sending to your email the debug data along with a video showing what happens to the timeline when I try to do the removal. Hopefully this helps identify what’s going wrong.