Logic Pro (X) Lost viola notes in score when changed clef.

[doceliot]

I have two viola midi tracks currently, one in legato, one in pizzicato. When I changed the clef, all the notes disappeared from the score. They are still there in the midi track. What gives and how to fix. Thanks.
doceliot

 

[Pete Thomas]

Did you just add a different clef from the inspector or did you change the clef style? If you changed it to a polyphonic style that is what would happen if your viola MIDI notes don't match the channel of the clef style.