And to add to what WPyogi has said, I would test to see if the plugin in question is misbehaving due to a WordPress update or because of a 3rd party theme and/or plugin(s).
That said, I would switch back to the default WordPress theme (i.e., switch from your current theme Thinner to say Twenty Fifteen or Fourteen). Plus deactivate all other plugins including WP Super Cache if it indeed is running on your site.
Once you’ve switched back to a default WordPress theme and deactivated all plugins except your suspect plugin, then test to see if it’s still misbehaving. And, if so, then as WPyogi stated above go to the plugin author’s support page and let them know about your issue running in a near default install of WordPress.
If, on the other hand, the issue no longer is reproducible, then you have a bit more work on your hands. Meaning that it’s not just WordPress + suspect plugin = bug. It’s WordPress + suspect plugin + yet to be determined theme and/or other plugin(s) = bug.
In this case, you’d want to slowly but surely turn on one other plugin at a time and test for the bug. And the same goes with your theme. So, for example, with WordPress and your suspect plugin running, you would switch back to your Thinner theme and test for the bug again. If it fails to reproduce then you can for now scratch Thinner off the bug accomplice list. This means you would switch back to the default WordPress theme and activate ONE of your other plugins. Say for example WP Super Cache. Does the bug reproduce now? If yes, I’d say you have plenty to discuss with BOTH plugins’ authors. If no, then you’d deactivate WP Super Cache and move on to you next plugin.
Hopefully this makes some sense. Being a software test engineer, this is the kinda stuff I do everyday so it seems rather basic to me. But, if one doesn’t do this stuff all the time I know it can become quite tedious. Not to mention you’re troubleshooting your live site and potentially confusing your users!
That last part being said brings up my last point to make. Going forward think about having at least two websites. One called Production, Live, or whatever doing what your current site is doing now. Servicing your end users. And another site called Development, Staging, Test, or whatever where you can keep a mirror image of your Live site harbored to test with when situations like these come up as well as whenever you plan to make any other kinds of changes to your site — such as WordPress updates!
Anyway, sorry about all that’s going on right now. Hopefully something here helps!
Sincerely,
Randy
