Boost with two yAxis - point flickers

[Basts]

Expected behaviour

No ghost point 👻

Actual behaviour

Boost with two yAxis - point flickers when hovering between series assigned to the different axes

Live demo with steps to reproduce

https://jsfiddle.net/BlackLabel/tvb3501m/

[bm64]

Internal note:
Used to work correctly in v7.2.1: https://jsfiddle.net/BlackLabel/hdur97zq/
Unable to bisect

[hubertkozik]

The bug is related to the fact, that there is only one markerGroup across multiple series with possible multiple axes, which position is set based only on first x-axis and first y-axis.

Related issue: #10464

A related part of code:

highcharts/ts/Extensions/Boost/BoostChart.ts

Lines 299 to 311 in b1fcbf7

	// See #6518 + #6739
	if (
	chart.boost.markerGroup &&
	chart.xAxis &&
	chart.xAxis.length > 0 &&
	chart.yAxis &&
	chart.yAxis.length > 0
	) {
	chart.boost.markerGroup.translate(
	chart.xAxis[0].pos,
	chart.yAxis[0].pos
	);
	}