Crash - entering drums with key shortcuts

Hi all,
I'm completely fresh to MuseScore and want to learn using it :)
And I caught a bug in setting up drum notation shortcuts. There is a context menu "Edit Drumset..." when right-clicking on a percussion bar. It seems to be rather convenient to set main instruments (bass, snare, hat, ride, crash, toms) on A-B-C... hot-keys and assign default voices, so cymbals go to one line and drums to another.
The "Default Voice" works incorrectly. When selecting "1" it actually puts notes to voice 2, "2" is voice 3 and "3" is voice 4. The most interesting thing is to set "Default Voice" to "4". When you enter a note with such voice from a hot-key, MuseScore always crashes.
Anton