sound channel change problem

Hi all,
This is my first entry into the issue tracker; I hope I do everything correctly.

I have been routinely using the Electric Bass instrument and hijacking the pop & slap channels for guitar effects (distortion, clean, jazz, etc.).

I have noticed a new problem:
In my example, the first chord plays fine; the second chord has the last un-tied note played in the 'default' channel sound (overdrive). All notes should be clean (Hawaiian).

Fair warning:
If I cut/paste the whole note chords I can make it work fine for a bit, but the problem eventually reappears.

I discovered it in 2.2. I reported this in the forum, and it has already been confirmed by one other in 2.1.

Thanks,
mike