Hi all... Matt from the Tech team here.
Thanks for bearing with us whilst we try to get to the bottom of this. I know it's incredibly frustrating to be seeing this behaviour on the site and I really do want to get to the bottom of it.
I've spent a bit of time trying to replicate the issue, both on real iOS devices that I have access to (iPhone XS, iPhone 11, iPhone 8 plus, iPhone 6S, iPad Air, iPad Pro 11") and on various Apple-supplied simulators that I can run.
I've managed to replicate it in a very specific set of circumstances on all of those devices.
If you go to your home screen, select Settings, then Safari and scroll down, there is a setting called Block all Cookies. Could you please check that that setting is turned off on your devices? I know that some of you are seeing this happen intermittently, but if you could check that setting it would really help us to eliminate something that could potentially be causing this.
I've attached a screenshot of the setting highlighted.
If you could let me know if this helps I'd really appreciate it, and hopefully we can get to the bottom of this together.
Thanks
Matt