Hello Musicstudent, Philly Jazz, Audiotrack and Ember!

Thanks for your input and suggestions. I am running 2021 BIAB. Thanks to your suggestions I believe I have found a solution. It is, go to the mixer, press the eyeball looking thing on the lower right of the mixer, there a menu shows and I have chosen "show all active". After which I am able to mute for example the melody tracks which were previously not shown to me. My previous setting has allowed for occasionally hiding a track that was either melody or a harmony type with that musical midi sound that was driving me crazy. I believe it is all solved. Had it not been for your responses I wouldn´t even have noticed that eyeball symbol.

Thanks all!

0zoro