Muse Sounds refuses to play fast violoncello passages

Hi,

So I'm transcribing a piano concerto for the Muse Sounds audio playback (which sounds nice now). However, the audio cuts out whenever the cello section plays a fast passage (in this case, a 16th note scale as pictured). In all other cases, the cello audio is working fine; I don't understand why the system just refuses to play fast notes.

I've confirmed that this isn't lag or a live playback issue, since when I export it the issue is still there. Does anyone know how to resolve this?