Alert sound not playing when someone joins the waiting room

Hello,

One of my users has been having an issue with RingCentral’s personal meeting room where, when a person joins the meeting and enters the waiting room, no chime / notification sound plays. For other users in our organization, that notification does play, despite their settings all being the same. 

In an attempt to troubleshoot this, I’ve tried to reinstall the RingCentral app, confirmed their settings would allow it (“Toggle Entry and Exit Tones”), and made sure that their Windows settings allowed notifications, all of which have not resolved the issue.