calendar
Since the latest upgrade to OS X 11.2.2 I am not able to attach emails to Calendar events by dragging. When I drag an email to the attachments field in a Calendar event I don't get the (blue and clickable) link that says "Show in mail", but simply a link (again, blue and clickable) with the text in the Subject field, that brings me to Safari when I click on it (and then tells me that Safari couldn't find the url).
It seems that dragging an email to a Calendar event puts a link to the url field and not to the attachment field.
What do I have to do in order to get email to link as an attachment to events, instead of as an url?
Calendar 11.0
MacBook Air 13″, macOS 11.2