Plugin version 3.5 just got accepted on codecanyon. May I ask you to upgrade it? If you download the plugin again, you should now get the newer version. It might solve the issue with the random results, as I thing I might know what have caused it.
There is a guide in the documentation on how to safely upgrade (1. chapter).
Don't delete the current version installer, in case it won't work or something 😉
I need to get some sleep, I will get back to you tomorrow morning. Let me know if the new version fixed anything.Best,
If you like my products, don't forget to rate them on codecanyon :)