BUG-000119822 for ArcGIS Pro

Bug ID Number	BUG-000119822
Submitted	February 4, 2019
Last Modified	April 27, 2025
Applies to	ArcGIS Pro
Version found	2.3
Operating System	Windows OS
Operating System Version	10.0 64 Bit
Status	Known Limit

Additional Information

This is a known limitation of vector tile creation. The spacing between the two lines of text is reduced by an expression, but vector tile creation does not honor changes to line spacing, it uses the default spacing. This is why the underscores of the second line of the label get shifted down in vector tiles. We have plans to add support for this in the future, but likely not in the near term. Refer to this page in the ArcGIS Pro help documentation: https://pro.arcgis.com/en/pro-app/latest/help/mapping/map-authoring/labeling-in-vector-tiles.htm for details about how labels are created in vector tiles.

Workaround

It is possible to manually edit the JSON style of the vector tiles to add the text-line-height layout property to the label layers displaying the issue. Setting the text-line-height value to 0.2 appears to have the same effect as the leading='-7' part of the label expression used to generate the labels, resulting in labels that look the same as in the input map.