Instrument chanel is not displayed,Drum track Assigned with piano

[yas]

Hi. 

I have
sony xperia z3 tablet compact, android 5.1.1, Audio-Technica AT2020USB+ USB Microphone, USB Audio Recorder PRO.

I import a MIDI file generated by iReal Pro to AEM , and record sound of saxophone to it.

*After update, In a new project, in mixer Instrument chanel on the rigt side of the Master chanel, is not displayed.
　In existing project, no problem.

*In existing project, the sound of the piano was assigned to a drum track.
　In a new project , no problem.

Best regards.