@Chris Anderson @nodle @scaz
Do any of you still experience this problem?
I have experienced this problem since I migrated to ISP (Cloud) last July. As far as I can tell, most members are unaffected, but a few of us always need to login twice. Once in a blue moon, I can login the first time from the home page, but it nearly always fails and I can only login from the /login page.
I check the system and error logs, but no error is recorded.
I've also experienced intermittent problems with CSRF protection key (error). Typically, I will have some days of problems with CSRF and it then ceases again (for no reason I can tell). I do not know if these issues are potentially connected - but both are unexplained, so I mention this just in case.
Because if the way it works (connecting with a third-party server), the only app I suspect could cause this is Antispam/Cleantalk - do any of you use this? Though, my searches here turn up no mention of common apps which could be the cause of either issue.