Yes as esackbauer wrote, you miss “Important — if IPv6 was enabled earlier” in docs. This is your case, you had
IPv6 enable and after fact you disabled it, there is bunch of stuff docs told you to do, you did not,…
Edit: Aslo man, read that red caution, it explaining your case exactly, you disabled IPv6 and your IPv6 is translated to default just as I wrote you before,…. it’s all in the docs. Just read it carefully,…