I noticed the real-time report and visitor counter stops to show data in the middle of this morning.
Matomo system seems to work properly because I can see in all pages and reports.
I checked the web service and mysql service and both are up. Also I checked the log_visit, log_action, session and log_link_visit_action tables in Mysql and they keep growing and seems to record all tracking requests properly.
What can I check to figure out what is happening? or How to fix it?