So I found the reason behind redirects:
I'm using the multilanguage version of Processwire, and it adds the language id to URLs (e.g mysite/en/page/)
My request URLs didn't have this language string in them (e.g mysite/page/) which caused them to be 301 redirected
I was able to find this out by using this plugin, which gives more detailed information about headers than Chrome dev tools (redirects are not bundled into one entry):
https://chrome.google.com/webstore/detail/live-http-headers/iaiioopjkcekapmldfgbebdclcnpgnlo
Thanks for the help I received
