Prblems with Matroska Files with different audio channels

[ZanderZ]

I'm kicking this thread because it's very annoying and it's a pretty big bug.
At the "key definitions" page, it has two options: "scroll through audio channels" and "scroll to soundchannels" (I'm using Dutch so the text might be a bit different in English)
When I use the first, nothing happens. The second one says "Channel 1", then "Channel --" when I use it. The sound doesn't change.
It works fine in MPC so the second channel does exist.

BSPlayers audio settings are set to 1 (default audio channel) and "eng" (default audio channel (language code))
Changing the first to 2 or 0, or the second to "en" doesn't help.