For the Gene Kelly films, this is the XML for the two menu entries (different films and different matches for the smart filter)::
<Role id="161183" filter="actor=161183" tag="Gene Kelly"
<Role id="199877" filter="actor=199877" tag="Gene Kelly"
So the refresh metadata setting isn’t fixing this issue. So I tried the Plex Dance and nothing changed… The ID is still the same in the XML. So I did another metadata refresh (I don’t use “optimized” versions of media) and still no change.