I can’t rule that out 100%, but I think I had a false positive that Argo was the cause as two things changed (I intended only 1 to change). I switched off Argo, later I noticed my device jumped back to my wifi connection (which worked).
That then pointed me to my mobile carrier (Optus). My iPad is on Telstra (it works Argo on, off, Cloudflare on or off in dns).
Optus is definitely NOT working with Cloudflare on via DNS. Cloudflare off, it works.
My home internet, another provider is working in all modes like Telstra.
I’ve lodged a support case with Cloudflare, maybe there is a connectivity issue with Cloudflare and Optus, to the best of my ability to diagnose the problems I’m seeing and having reported from web users that would best explain the symptoms so far. It’s been going on for some time, most of the day so a ISP routing problem to Cloudflare for that long would be a rare thing I’d imagine. Anyway I’m trying to figure it out, but I can’t see all of the internet at once. I have 3 connections, 2 of mine work fine. I’m getting reports from twitter my websites are broken and others saying it’s good for them.
Turning Cloudflare off (going from Orange to Grey Cloud in dns) did seem to get some of those people reporting back it’s good for them now, but wasn’t before. I wish I could turn Cloudflare off for people on the Optus Network only, but that isn’t a thing @ Cloudflare and usually would be a useless feature except while I’m trying to figure out the problem exactly.
If only I could talk to a mobile phone company at 10:45pm at night who would actually try and diagnose if their network was working to Cloudflare. I think I’m best to go to bed and see if it’s resolved in the morning. If not at least I’ll be calling a mobile carrier in business hours and hopefully getting to someone with the ability to test my theory out.