Hello!

We have a strange issue where Moodle chat was working until some day it just stopped delivering messages. 

I can open it, write a message to someone but the message itself is empty. The message can be seen under contact, but not in the main window. Strange thing is that chat thinks, that the time is always 3:00 AM and maybe that is the problem. 
I have changed chat method to normal, ajax and server, but in all 3 modes this glitch is happening. 
I have changed IP in chat settings from 127.0.0.1 to real one, I also changed port to firewall friendly (8080). 

I would be grateful for your ideas.