In ArcGIS Pro 2.4.1: When I select "Add To Display" for the output of a Kernel Density function, the name is wrong. The name appears as %Name2%_Estimatexxx.img instead of the filename... AMCR_Estimatexxx.img. However, the correct filenames get written to disk, so the workaround is to not add the output to the display, but to add the rasters after the model completes. This appears to be a bug.