White fill in organization chart's connector lines - highcharts

I'm using a Organization chart and I get this white fill with all the connector lines. I've checked all the color in the code and i couldn't find the element that is causing it.
https://jsfiddle.net/y_tddel/jdtoc10q/2/
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I had started with this demo. and the issue can be seen here as well. It becomes clearly visible when 'inverted' is set to false,
https://codepen.io/mushigh/full/gJEZxm
EDIT:
Added an image for reference
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EDIT2: Node & parent highlight

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Datapoints in Xrange highchart are not uniformly getting aligned to the center

I am trying to align the data points to center(vertically) in each data row of the graph using my data , but the alignment is pretty much inconsistent. Some points start at the top of the row and some at the middle and few of them near the bottom . I tried using the point placement property and I was able to alter the position . The problem I faced was , the data points/data lines(green) at the top could be brought to middle but the points/lines(green) that were present in the middle and bottom moves further down and looks very inconsistent . I have tried most of the properties available but all in vain . Could someone guide me how the point position is calculated in the graph and is being positioned . How to bring the data points to center in each row. I have attached the screenshot/image for your reference. I have encircled the data points in blue .
enter image description here
enter image description here
I have reproduced your problem in this example: https://jsfiddle.net/BlackLabel/70ts5myc/
The empty space is reserved for columns with similar data values to prevent overlapping. To prevent that disable grouping:
plotOptions: {
series: {
grouping: false
}
}
Live demo: https://jsfiddle.net/BlackLabel/ahe4Lugf/
API Reference: https://api.highcharts.com/highcharts/plotOptions.xrange.grouping

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Update:
I was never able to find a solution to this and ended up just going with a white back ground. It was purely for a nicer aesthetic look to allow a basemap to be seen. If I ever come across a solution, I'll be sure to post it.
I had the same question. I found the solution in the developer group.
See the answers: https://groups.google.com/g/google-earth-engine-developers/c/WcxtEIzudxw/m/GscOlsQhDgAJ
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Could anyone provide some insight into what may be causing this? In case this may be a factor, the chart is generated based on a table of data using Highcharts.visualize().
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