I have configured the default search widget in WAB to search many layers (100+) based on the field AssetNumber. AssetNumber is also used as the Display field for suggestions. All layers are configured the same way (shown below), with 6 max suggestions and results, Zoom to default scale and show pop-up enabled. All search sources are map image layers pointing to data in registered SDEs in our enterprise database system. Using Portal 10.8.1.

When using the dropdown in the search widget to narrow the search, some layers show as LayerName : AssetNumber, where some just show LayerName. If all layers are configured the same, why do some get the additional information showing which search/display field is used?

This isn't a problem per se, but I would like the look of the dropdown to be consistent, and besides that, it just doesn't make sense.
Thanks for reading!