Melisma line too low

I'm playing bass for a Christmas Eve production at a local church (not ours). On an a cappella arrangement of Silent Night by Pentatonix, the worship leader has said that he might add stuff to that, so I'm copying the sheet music into Musescore on my laptop. However, when crossing pages, there's a melisma line in the alto part that is too low and falls within the staff for the tenor part, as illustrated in the attached screenshot, where I've also highlighted the problem in GIMP. For the record, I'm running version 3.2.3dfsg2-11 on Debian Stable ("Bullseye").