What’s curious about all this is how different people are getting different experiences on the same or similar platforms. One possibility is that something from the old site is being cached and used by the new site, some people happen to have that in their cache and others don’t.
To clear your cache on Windows is Ctrl +F5, on Mac it’s Cmd + Opt + R. On iOS there’s a couple of ways: go to Settings, Safari, Advanced, Website Data then find STW and clear the data (this will include login data) or force quit Safari (click the home button, then double-click the home button, press and hold the Safari icon in the multitasking bar, then tap the red dot), it appears that Safari will clear its cache. But this will clear the entire cache, not just a single page