Reverb: Exported WAV vs. MuseScore playback
using: musescore nightly
This is part bug part UX strangeness.
There are two reverb/chorus settings in Musescore: the "instrument" dialog box has a reverb/chorus slider and the "mixer" dialog box has one too. It is unclear what both of these do as they do not work in an intuitive way:
The instrument reverb slider affects the sound you hear while playing within musescore.
The mixer reverb slider has no effect while playing back in musescore but does determine the amount of reverb in the rendered score. This last bit seems an error to me.