Using New Outlook on Windows for professional communication and productivity
I was informed by a high level Microsoft employee last week that this is not a bug, but done by design. They didn't get into it any further from there other than to say that the messages will send after a period of time, but it's not instantaneous anymore. This only affects the "New Outlook" desktop client and the web version. The regular client32 version is still unaffected by this change.