"Grace note after" doesn't sound during playback
Grace notes "after" the anchor note do not sound during playback.
E.g. bars 20 & 22 in https://musescore.com/user/9743111/scores/2146431
Additionally, creating a slur between the note and the grace note after, the slur appears upside down until manually transformed.
Forum post that brought me here: https://musescore.org/en/node/111191
Cheers! Keep up the great work.