[BUG?] Network graph, on auto, sizes graph based only on most recent 5-10 seconds

[VA1DER]

I have noticed that the network traffic graph when set to auto sizes the entire graph based only on the traffic received in the last 5-10 seconds. Even if the graph is a full minute wide. This means that spikes of 10 or 20 megabits/s are resized totally off the graph if the traffic in the last five seconds is on the order of a few kilibits/s. The entire left 90% of the graph becomes useless.

Is this by intention, or is this a bug?