Just upgraded to
2017.01. This bug is now FIXED! Yahoooo!!!
Strange.... nothing about it in the release notes. Maybe it was too trivial to mention. Also, I entered problem report
CWBRN-54849 about this back on October 10, 2016. The problem report status is still showing as "new" and not yet reviewed.
Anyway, I'm much happier now. That bug was cramping my midi drum editing style.