Large numeric labels create overlap

[fxwiegand]

Large numeric labels create an overlap between labels that I can't resolve. I have tried using different strategies via labelOverlap and increasing labelSeparation. I have attached our full specs as well a screenshot showing the overlap:

The corresponding part in our plot is the first item within the vconcat and in there:

"axis": {
  "labelAngle": -0,
  "orient": "top",
  "title": "Position (1-based)"
}

Don't mind the - for labelAngle that's just a leftover of trying various stuff and doesn't influence the overlap.

Full plot in the Vega Editor