Hi Ben & Jamie
Here are some information that I got from siteground hosting support, maybe this will help? I honestly have no idea what this means….. 🙁
” If the plugin has a pre-set url being used for your payments for example., and it’s configured to work without www – you will need to manually update this on your end. The loop is created when the site is supposed to open with www, but there’s a page that still tries to load with non-www url., causing the redirect.
Since all of your default site’s urls were updated to work with www – there may be a hard coded one (part of the plugin set up) that still loads with non-www. As an alternative – you may consider contacting the plugin’s developers and double-check with them for any known issues. ”
Thanks