[Bug Report] {upc} tag not appearing in folder names

[SimplyWidgeon]

Problem

When using this folder structure:
{album_artist} - {upc}

The folder name appears as:
Nirvana -

Type

Album

Spotify URL

https://open.spotify.com/album/4bvBe5ZmDyzjr2IXhAC89x

Additional Context

This issue is not exclusive to this album, artist or streaming platform. It happens with any combination of these.

SpotiFLAC Version

v7.2.2

OS

macOS Sequoia 15.7.2

Location

UK