Vocal Artifact With MuseSoundsChoir

The MuseSounds Choir feature is showing an annoying artifact that affects the quality and useability of playback. On several multi-part scores I am developing using the Barbershop - Men template, the playback exhibits what sounds like a hesitation in the start of sound for adjacent parts. This music has very strict timing with the adjacent parts supposed to sound exactly together (i.e. "tight). It sounds like the various parts have small, random starting times for each beat of the music.

This is completely reproducible between scores. The "original" Musescore sound library does not do this. It seems to be new with V4 and MuseSounds.

I am attaching a score that shows this behavior. Depending on the rhythms, it is more or less apparent, so please listen to the entire score. I would like to attach an .mp3 of the score played onm y system, but it seems to not be possible.

System: 27" iMac 2018, Ventura 13.2.1

Thanks!