Highstock: Wrong horizontal scaling of remaining series after hiding one serie

[stpoa]

Expected behaviour

After clicking legend item all remaining columns should be scaling to remaining space in x axis.

Demo with working chart using Highstock 4.2.6
http://jsfiddle.net/mwsm0nvk/

Actual behaviour

From version 4.2.7 columns don't scale after hiding one series, all remaining series point range is decreasing to lower value than expected.

Live demo with steps to reproduce

http://jsfiddle.net/3u357f8h/

May be related to:
#5329

[pawelfus]

Thank you for reporting.

Demo with fixed width: http://jsfiddle.net/mwsm0nvk/2/ (it's important to see dataGrouping in use).

It's a regression after 4acf1e4.