Problem with charts

I bought new P4 megaset produced by May 2018 with latest firmware

Problem that sometimes charts for all sensors is holded until i restart P4 (disconnect power cord from power socket)
Attachment 10778

please help with my new P4

Attachment 10779After as I restarted P4 again due to frozen charts (on 09 Jun, charts were updated but now its displays up to 08 June.... I do not understand anything :(