Unchecking 'Play' property of an accent has no effect

Unchecking the Play property of an accent has no effect in playback.

Steps to reproduce...

1. Start a new score
2. Enter a quarter note
3. Start playback - note playback is of default velocity, as expected
4. Apply an accent (">") articulation to the note
5. Re-start playback - note playback is louder, as expected
6. Uncheck the "Play" property of the accent
7. Re-start playback once again

Expected result : playback is back to default velocity
Actual result : playback is still louder, as if "Play" property were still checked

See attached score for an example.

[Note also that when unchecking the Play property, the "Time Stretch" and "Ornament style" properties are disabled. However, on unselecting and then re-selecting the accent, those properties are enabled and editable once again].

OS: Windows 10 (10.0), Arch.: x86_64, MuseScore version (64-bit): 3.1.0.6437, revision: 06f0ddd