Y axis of Cumulative Flow Diagram report should scale automatically

The Y axis of the CFD report (JIRA Agile) should display a range that (vertically) magnifies the data for the specific timeframe shown.

Current behavior:
The scale of the Y axis (issue count) starts from 0, regardless of the timeframe being shown.
The effect is that long-running CFDs tend to look flat when one inspects a relatively short portion of the time (i.e. one week, for an initiative that has been running since several months or years). This doesn't help to appreciate bottlenecks, trends and other KPIs that such report is supposed to provide.

Expected behavior
The scale of the Y axis is offset to the number of issues that were in the "lower-layer" status at the start of the timeframe considered (i.e. ~450 in the attachment)
The benefit is that data are readable, regardless of the timeframe selected: trends can be better appreciated because the Y axis "zooms" to just the relevant range