I have web scenario for my web page with one step and with 300 seconds timeout and 30 seconds update interval. Response time can be >120seconds, but usually it's <1second. Problem is with visualization of this specific values. Problem is only with graph, where metric has draw styles: Line/Bolded line/Dashed line/Gradient Line. Web monitoring graph is filled region, so there is not a problem, but graph in last data have the problem. Zooming doesn't help - I'm attaching some printscreens. Tested with Zabbix 47908 revision (trunk).