Project crashes my PC as soon as I try to load it

So, I am working on this project that crashes not just Premiere, but my entire Windows every time I open it. I have been working on it for a couple of weeks. It worked perfectly fine for the first few days, then one night I saved and closed the project to go to bed, and the next day I started encountering these crashes.

The weird thing is that, if I copy and paste the project and open the new file, it opens and runs just fine. So basically, if I want to make further changes to it, I have to copy and paste the project file. I've tried deleting my cache, I've tried deleting my rendered files, but with no success. For context, I think it overwhelms my RAM because if I have, say, a YouTube video running when I open the project, it immediately stops the video and tells me I don't have enough memory.

I have 32GB of RAM, Windows 11, the latest version of Premiere, plenty of disc space, and my PC is almost brand new. I've found a workaround to finish the project, but I'd like to know what could be causing this in case I encounter it in the future.