Oh odd, I haven't run into that. If you're able to set it up manually, does the audio act like this under any other fork of DOSBox? The preconf'd downloads use the latest release version of DOSBox-Staging at the time of writing, so it could be an issue with that
(The only other thing I can think of is an audio system discrepancy; I still use PulseAudio on my system despite everyone else seemingly using PipeWire at this point. But I don't think that'd be the issue)