Only one part of my score on the WEBSITE is playing
You can see it here:
On all my drumline cadences, only the cymbal part plays, with the three other parts being mute. Like I said in the title, this is a problem on the website. I know about the mixer and I can hear all parts when I write, but not when I upload. Now, an important detail (I think): All the drums are part of the Musescore Drumline extension, the cymbals are not.