Using New Outlook on Windows for professional communication and productivity
I am having the same issue in Outlook New (I'm on 365). Prior to this I was using Outlook and this never happened. It is not the internet connection.
Emails getting stuck in drafts happens regularly and to different recipients, sometimes individuals and sometimes groups of people, sometimes new emails and sometimes replies. I now have no confidence that my emails will send at all and have to check the sent items after sending an email.
Also, when stuck in drafts I usually cannot send from drafts but have to copy and paste into a new email.
I do like Outlook New but there are two bugs that need acknowledging and fixing. This one and the fact that read messages often revert to unread for no reason and the read/unread does not sync with the Iphone app.