.wav format doesn't show (kbps number)

Hello MOC staff/devs!!!

For some time i have noticed "WAV Files" doesn't show kbp/s numbers below window.
Only on WAV format have see something like this missing.

FLAC, APE, MP3... are showing normally.

here it is

I do not mind posting, simply a cosmetic issue but can you check a ".wav" files please?

$ nili@debian:~$ apt-cache policy moc

moc:
Installed: 1:2.5.0-1
Candidate: 1:2.5.0-1
Version table:
*** 1:2.5.0-1 0
500 http://ftp.us.debian.org/debian/ jessie/main i386 Packages
100 /var/lib/dpkg/status

Regards,
Nili