This problem is not new but it is starting to have am impact on my business. The bottom line is Safari users seem to have issues logging in. It seems that Mac users who use a Chrome browser do not have an issue. iPad users seem to have a lot of issues.
I wonder if the fact that my forum is embedded in an iFrame makes a difference / makes it unique? I personally do not own any Apple devices but a lot of my users do. About 40% percent of my users are on Apple report some sort of issue signing in. It seems like they can log in for a while and then one day they can not.
From a support perspective I know you (Vanilla Support) want/need a narrative to reproduce the problem. I do not have one. It seems that when these users log in they enter the right password but then nothing happens. When I look up their account it appears they were logged in. So they are logged in but not redirected to the page where they can act as a logged in member. Something like that.
Please see comments from my users. http://www.ballofspray.com/forum#/discussion/12214/site-software-question-please-answer-this-poll/p1
Here is a poll I ran.
I tell all users with a Mobile Apple issues to do the following. Sometime it helps and sometimes not.
Apple mobile devices login trouble shoot guide. iPhone, iPad & iPod
Apple mobile devices login troubleshoot guide.
1. Completely close Safari by double clicking the home button twice quickly then swipe up on the Safari App.
2. Shut off you device completely then reboot.
3. Go to Settings->Safari->Block Cookies->From third parties and advertisers (you can also click never)
4. Launch Safari then go to the mobile forum. Sign in with your username and password. Click "Done" on the keyboard and make sure "Keep me signed in" then click "Sign In"