BUG-000106281 about this issue is apparently fixed for Pro SDK at release 2.3,
https://pro.arcgis.com/en/pro-app/get-started/release-notes.htm
but I still cannot apply symbology from a layer file to a layer in my map through a script tool in Pro.
I have tried both call methods:
arcpy.management.ApplySymbologyFromLayer(target_layer, symbology_layer)
arcpy.ApplySymbologyFromLayer_management(target_layer, symbology_layer)
And I have tried .lyr and .lyrx
I know it is a problem with Pro, because if I run the exact same script tool in ArcMap (10.3) it works properly.
Any information or suggestions?