The Beatport API accessed starting with Yate v6.1 does not append a mix name to the title.
If run after importing metadata from Beatport this action will append a mix name in the Description field to the Title field.
If you wish you can have this action run automatically after each import from the Beatport Importer. On the Options panel check Run action after import and select this action.
Actions: Append Mix Name (Description) to Title
2020-10-30 First release.