I went in and reconfigured my php-fpm pm.start_servers values as it appears default pool was too small and would get busy quite quickly. I am hoping this cures the issue. I found no other PHP errors to deal with so I hope this is the culprit. So I am hoping that getting this fine tuned and all will be well on the Instance, or so I hope. 😀

note: The default is really low which is 50. If I can exceed that limit with only 3 active users I am sure it will have to be much higher. I will have to do more research to see what a good value should be.