Exporting Individual Parts Audio Does Not Work in 3.1

Prior to 3.1.0.22425, one could use the "Export Parts..." feature to export audio individually from each part. Now, when using "Export Parts...", MuseScore exports audio from the entire score for every part preventing users from having MP3s of the individual parts.

This is significant because I depend on this feature to send my choir practice recordings of the individual soprano, alto, tenor and bass lines. Now it seems this feature will only allow me to send the entire score which is not helpful for people trying to learn to sing individual parts. Please help.