This used to work but changed a week ago; when I am sent an event as part of an email message it used to display an event box to the top right and the message would display as normal - now I cannot see the message at all as just the event is displayed in the message box as an event Invitation. I can see the message if I go to the Source (but not aways), but that's a lot of work for something that should be displayed automatically! I use Thunderbird and Lightning, automatic updates, on Lubuntu.