Playback not working for large ensembles in MuseScore 4

I just got MuseScore 4 and I've been running into issues with playback. I can play back a piece for a solo instrument or small ensemble with no issue, but when I attempt to play back a piece for a large ensemble (think a normal-sized symphony orchestra) no audio plays whatsoever and no levels appear in the mixer. The playback cursor still moves as normal and I can still export the piece as audio and listen to it. I've turned up my audio buffer to 4096 but this did not solve the issue. A concern is that my laptop only has a 2-core processor; would this cause audio to not play outright?