GetLinkerCustomVersion doesn't seem to work

I’m trying to use the custom version on PostLoad() by calling GetLinkerCustomVersion( MyVersion::GUID ) but it always returns -1. I’m not sure but I guess it worked correctly in previuos versions. I’m calling the Ar.UsingCustomVersion( MyVersion::GUID ) in the Serialize( FArchive& Ar ) so I think I’m not missing anything and when I call the Ar.CustomVer( MyVersion::GUID ) it returns the correct number. In my case I need to change things in PostLoad so I need the GetLinkerCustomVersion to work correctly.

Thank you in advance.