Disc numbers are completely ignored

[msdobrescu]

Describe the bug
Neither cue file REM DISCNUMBER X, neither directory name like "disc X", "Disc X" or "CD X" (where X is a number in a range 0-99) are recognized.

System (please complete the following information)

• OS: Gentoo Linux
• CPU: AMD x64 compatible
• RAM: 64 GB
• fre:ac v1.1.7 flatpak/appimage

Additional context
The tag filed is not filled up, the cue split is not performed with a valid output value for tag.