Is there any sort of server-side caching enabled? This is a performance option that basically generates a static page the first time a page is viewed, and the cache is an HTML copy of what was viewed that is served to visitors instead of regenerating the page from scratch each time.
Typically the cache should be set up so that it's bypassed for logged-in users. If it's being generated and loaded even when a user is logged in, you would see the issues reported here (that I am seeing as well) where as you click through different pages, sometimes you're logged in, sometimes not, and sometimes you are a different user or there's a different theme.
Typically the cache should be set up so that it's bypassed for logged-in users. If it's being generated and loaded even when a user is logged in, you would see the issues reported here (that I am seeing as well) where as you click through different pages, sometimes you're logged in, sometimes not, and sometimes you are a different user or there's a different theme.