The polyline edge routing strategy somehow handles spacing weirdly.

[soerendomroes]

See https://github.com/kieler/elkjs/issues/255

When using the ortogonal edge routing strategy the edgeEdgeBetweenlayers spacing has no effect in this graph.

For POLYLINE, the spacing seems to be somewhat relevant but not in a linear sense, as seen here.

This is quite confusing and I guess should be investigated.