Notification count is not synchronized when the alert menu is opened

Steps to reproduce:

• Enable notifications for the application "Pages"
• Disable the "own event" filter
• Go back to the main page
• Clear the notification
• Refresh the page
• Notice that there is no counter above the bell (since there is no notification to display)
• Add a comment to the page
• Don't refresh the page but click on the bell
• The notification menu is open, and the notifications are loaded asynchronously, so the notification about the comment you just added is displayed
• Mark the notification as read
• Notice the counter above the bell