I use BIAB 2018 and have come across a puzzling thing recently when I use the mixer sliders. If I slide any of the mixers during playback from, say the default level, down to zero the volume of the melody track drops to zero also. Any adjustment of any track slider seems to affect the melody track. I don't know if I have unwittingly clicked on some button in error without realising it.
Can anyone help with this please?