Sections of my editing disappear

I have been using kdenlive to edit on my Ubuntu 23.10 PC the past couple of days. And today I have noticed that suddenly parts of my editing are completely gone when going back to parts from earlier. I don’t know if I somehow hit a keybind or mess it up myself or if it’s a software issue. I would very much like to avoid this happening in the future.

This has happened to me 3 times today
Here is the latest section I’ve noticed. I had a bunch of edits here but now only one audio line remains for some reason. it even cuts the second audio line and all of the video lines. The files are still inside of the project bin too
Other than this kdenlive has been an amazing editing software!