Entering percussion notes other than quarter notes
I'm trying to enter parts into a snare drum (one-line) staff. Unfortunately, what I'm experiencing is vastly different from the documentation (https://musescore.org/en/handbook/3/drum-notation). I'm using MuseScore 2.3.2 on Linux.
According to the documentation, the proper way to enter percussion is to enter note edit mode, set the duration, then type the key for the note type (A in this case). However, this isn't working for me.
When I enter note edit mode (whether step-time or rhythm mode), if I want a quarter note, I can hit A and get it. If I try to change the duration, though, MuseScore automatically inserts a note of the selected duration the instant I select it (via keyboard or mouse). The effect is the same as if I were using the rhythm input mode for a normal instrument. I must emphasize, however, that what I'm seeing in percussion is the same REGARDLESS of mode. Worse, any notes that I enter other than quarter notes (rhythm input style) play a whistle sound. Since this is a one-line snare drum staff, there's no reason why I should ever hear a sound other than a snare drum.
What's wrong? Is the documentation buggy? MuseScore categorically does NOT work as described in the documentation, and I'm flying blind here.