Hello, brand new to Zabbix, 3.4.2, and don't have Administrator privileges. I was looking at a graph in the "Latest data" tab, generated for a 4 month period. I clicked in the graph and dragged the mouse to select a subset of time, and when I did, for some reason it blanked out that part of the graph, and for that subsection of time it now says "no data" and the graph is blank for that part. How did that happen, and is there any way to retrieve that? Thanks.