Steps to reproduce:

1. create Zabbix trapper item
2. sand data.sender data to this item by using Zabbix sender utility

   zabbix_sender -c zabbix_agentd.conf -Ti data.sender

3. create SVG or classic graph widget with this item on any dashboard and save it
4. set period from 2023-05-31 15:50:00 to 2023-05-31 15:54:00
5. enter edit mode again and try increasing or decreasing the graph height

Result:
PHP script on server side goes into infinite loop with 100% CPU consumption