Zooming in graphs

Zooming in graphs

If i select a time interval of one hour in the graphs, then a description of the protocols and the number of bytes will appear below.
But if I start to zoom in on the time, then the number of bytes is not recalculated according to the protocols. The same thing happens on the traffic graph. Why is that?

In the 9th version, the number of bytes is automatically recalculated when zooming in graph.