How to find which script is causing my website to keep loading

When loading my website in Google Chrome, I sometimes have the issue that the website just keeps loading. I think it has something to do with a request to Google Ads, but I’m not sture.

I thought I could just find the slow script in the ‘Network’ tab of the Chrome Dev Tools, but the script doesn’t appear there (possibly because it never finishes loading?). How can I check which request is causing the eternal load?

Thanks!

Google dev tools