I normally access VAF using my iPad. Over the last few weeks I have to logon multiple times during a session. It doesn't happen all the time.
I'll open one thread, then go back to "Todays Posts". Sometimes when I click on another thread, it wants me to login again. It remembers my Id & Password but I'll have to click the login prompt to proceed.
Yesterday, I wrote a reply to a thread and when I went to Preview it, I got the logon prompt. When I logged back in, everything I had typed had disappeared.
I writing this using my PC, so that hopefully, this reply works properly.