When I use 78.8.1 on Windows 10 and get a new email notification, the
most I see in the notification dialog is six messages. I could be
getting many more than that depending how often I use the application.
After that notification, and one new email arrives, I see it with five
other previous emails any of which I can click on and read.
That's much better than the native Linux notification which only shows
one message with a notification that only brings the application into
focus if I click on it, and then I have to find the message.
Are you seeing more than six?
OS: Fedora 33 Workstation - Gnome Desktop