Harp non-arpeggio brackets

In general, I use musescore as a scorewriter, with playback as a secondary; but in doing some scoring for Harp, I've noticed a glitch which is not only incorrect, but the opposite of correct. Chords with arpeggio lines play fine, and even the down-arrow lines are realized correctly, although cross-staff lines do not realize. But brackets cause arpeggiation as well, which is the exact opposite of what they're intended to mark.