I upgrade zabbix server from 3.2 to 3.4 by pulling zabbix server image. After upgraded zabbix server, all my web scenario response time become very slow.

The maximum response time value over 1h... But time interval only one minute. Response time over one hour within one minute is unreasonable. All my web scenario has same problem. I have been set debug level to 4 but log doesn't show any error.
Is my zabbix setup fail? How to debug web response time?
Thanks.

The maximum response time value over 1h... But time interval only one minute. Response time over one hour within one minute is unreasonable. All my web scenario has same problem. I have been set debug level to 4 but log doesn't show any error.
Is my zabbix setup fail? How to debug web response time?
Thanks.