running Asterisk 13.12.1, and using mixmonitor() to record conversations, with the b flag to only record when a bridge has been created / established. Unlike with other versions of asterisk that i am running it seems that with this one, mixmonitor leaves behind empty wav files when the call is not answered. One example is that when receiving a call into a queue, which then rings out a number of people, an equal number of empty recording files is created but never cleaned up.
Does this sound like a bug? or is this the expected behavior of mixmonitor when it is called from the dialplan?