When a layer file (.lyr) that references a layer whose symbology is set to Categories and the <Heading> label removed, is added to a new map, the layer name is not shown in the legend.
Last Published: April 6, 2015ArcGIS for Desktop
Bug ID Number
February 23, 2015
November 24, 2020
ArcGIS for Desktop
Operating System Version
After review by the development team, it has been determined that this issue is related to a known limitation with the software that lies outside of Esri's control. The issue's Additional Information section may contain further explanation.
Turn the layer name on in the legend using the legend properties dialog. Re-symbolize the layer to get headings back.
Save .lyr files that use the Categories symbology with the <Heading> line intact. Remove that as necessary in individual maps.