Shared tooltips not showing all data all the time

[rustedgrail]

Expected behaviour

The shared tooltip should show all the points for a given X

Actual behaviour

The clientX is very slightly off, so the equality comparison removes some of the data. This happens for some points on some graphs, but it happens consistently for those points and graphs.

kdpoints[i].clientX
711.1666666666667
kdpoint[1].clientX
711.16666666667
https://github.com/highcharts/highcharts/blob/master/js/highcharts.src.js#L10357

Related to

#4645

Live demo with steps to reproduce

https://jsfiddle.net/23a7Ls9n/3/

Affected browser(s)

Chrome, haven't checked any other browser

[rustedgrail]

For all the categories we checked, kdpoints[i].plotX === kdpoints[1].plotX.

[pawelfus]

Hi @rustedgrail ,

Thank you for reporting the issue! Interesting fact (or a workaround): if you remove pointPlacement: 0.0 it works fine: https://jsfiddle.net/23a7Ls9n/8/

Internal note:
Minimized example: https://jsfiddle.net/n81k7ee5/