I've been using WordPress for about a year, but for the past month or so, when I open my dashboard, it appears but subsequent clicks require me to log in again.
Opening my dashboard, it appears fine but when the Jetpack stats widget loads, instead of displaying my stats it displays a login form, and any subsequent clicks also require a log in.
Furthermore, sometimes WordPress logs out midway through editing posts, which means errors when autosaving. I have lost work as a result of this.
It's getting very frustrating. Disabling Jetpack, and any other plugins I have added recently, makes no difference. I've also reset the salt data in wp-config.php. I'm at a loss - what can I do to fix this? Clicking 'Remember Me' doesn't seem to do anything.