So sorry, but from i installed chat all weird php issues started.
I am sad because i trusted in this plugin, but i had not any issues until installed this plugin.
I hope you can replicate those issues yourself because i am tired tryind to understand what is happening. I talked with my hosting techs and they tuned PHP, but again, i do not remember have issues until use your plugin.
For now i will come back to my old stand alone chat system that never generated any problems.
Thanks for your kindness, becuase your service is great, but i am thinking that chat plugin is buggy.
Note: My old chat is Ajax/PHP too and it is so far more fast.
All the best