Legend entry for raster using advanced labels

[der2020]

Hey all,

I'm using a raster with advanced labels in a Web Map and the legend has modified the labels I specified in ArcGIS Pro, adding in text that says very crudely "AVANCEDLABELS- [my actual label]" even on portions of my stretch symbology that do not have labels. Is there a way to omit this? To upload to ArcGIS Online, I uploaded the ArcGIS Pro map as a Web Map. Attached are images.

Legend/Symbology in ArcGIS Pro (v. 3.2.0):

Legend/Symbology in ArcGIS Online:

Any help would be incredible!

- Daniel