Refresh issue with time-based plots (on change of time period)

[apellew]

When I change default time-range from 7-days down to 2-days for a time-based plot the values in the graph are re-drawn but the graph isn't re-scaled. For example, this is a 7-day plot;

When I change this to a 2-day plot I see this;

If I use event-based (rather than time-based) reporting then changing the date-picker appears to correctly refresh the plot.
Here are my browser details; https://www.whatsmybrowser.org/b/UH17M (Basically Chrome 80 on macOS) in case that helps. I'm using Grafana v5.4.3 (6539180) as our customer uses Internet Explorer only. And running 0.0.6 of Plotly.

Any help appreciated!