[Frontend] [Backend] Admin View Events Page: Issue with Displaying Correct Volunteers

# Description

Sometimes when you click onto the Events page on admin view, it doesn’t populate the attendees of the events automatically until you click into a different day and back (or it populates attendees of the wrong day until you click into a different day and back). Figure out why this is happening.

# Testing

Make sure that this doesn't happen no matter the case.