Problem

Notification email is not sent, to any user, if more than one user is assigned an event

Environment

Confluence 8.2.2

Steps to Reproduce

Scenario A: This Works

1. Create a team calendar event for a specific time
2. Uncheck "all day" event option
3. Once created, the user who created the calendar event will receive a reminder, 5 minutes before the event starts

Scenario B : This does not work

1. Create a team calendar event for a specific time
2. Uncheck "all day" event option
3. Under "who", add multiple users

Expected Results

For scenario B, we would expect reminder mails to be sent to everyone who was selected under "who" option along with the event creator.

Actual Results

If more than one members are added under "Who", no one receives a reminder. Whereas in Scenario A, at-least the event creator receives a notification. Adding members under "who" stops notifications to be sent to anyone.

Workaround

NA

Notes

This appears closer to : https://jira.atlassian.com/browse/CONFSERVER-78467 but the use-case seems to be different in this case.