In version 4.0.16 graphics are being trimmed when selecting a longer time period.
In the lower prints, zabbix that monitors the host "TF-BL-PROXY4" is at version 4.0.16, and the graphics are cropped over a longer period of time, even if "Now" is selected.

The zabbix monitoring host "AMIX.AMSXM03" is at version 4.0.15 and as selected longer period of time, it continues to show up to the current value.

We downgraded the zabbix-web- * package and the issue has been resolved.