<length> does not work as place holder

[SilasWegg1]

In the "Filename pattern:" field under "output filenames" on the "General Setting Setup" window if I put something like

"Bach J.S/The six Motets - / - <title> - "

does not result in the length of the track being put there. I assume this is a bug as the other fields , <title> and work. However if this is not considered a bug this would be a nice new feature.

To Reproduce
Rip any CD but make sure you put "" after the second "/" in the Filename pattern field

Expected behaviour
The place where occurs should be replaced by the actual length of the track

System (please complete the following information)

OS: macOS Catalina 10.15.7
CPU: 3.2 GHz Quad-Core Intel Core i5
RAM: 24 GB 1600 MHz DDR3