I'm always looking for ways to get students to play long tones so I appreciate the recent additions to method books that are designed for this. However, when I try to play through the above mentioned new addition I select B-Flat trumpet, play through one selection and then use the drop down menu to select the next piece in the book the instrument always switches to a seemingly random instrument like violin or bass clarinet or bassoon and I have to re-select B-Flat trumpet. It's a pain. . . please see if you can replicate this issue and address it. Thanks!