Are you using the integrated flow with a central library? If so then you need to make the same edits in the central library property file as you did for the netlist flow. If using a netlist flow then check the symbol editor is pointing at the correct file in Settings.
Thanks for the response...
It seems that relative paths are supported re the property file for VX2.3 and schematics but the symbol editor cannot handle relative paths. I had to switch to an absolute path for properties.
In that case we will log this internally to make it consistent.