audio(sound) is missing in licode recorded *.mkv files

Question

I am using licode docker latest image on my machine to run and test licode video recording feature. The recording feature is working as expected only audio is missing in recored *.mkv file. I have already cross checked the configuration part. Audio in config is true while making the connection with erizo. localStream.hasAudio() return the true. So i have no idea what i am missing here.