@alexhaydock @nixCraft something that can be useful is browsing the web without IPv4 enabled at all. When you try a site and it doesn't work, try both the variant with and without `www.`, sometimes one works while the other doesn't. When a site loads partially, for instance images do not load, check whether they might be hosted on another domain without a AAAA record.
Mail webmasters when you see these issues. They tend to be responsive and quickly fix them.