This has been happening for months for us also. I can't believe Microsoft is saying they cannot reproduce the problem.
Steps:
In a chat, type some message. Hit enter to go to a new line. Type an asterisk and a space to start a bulleted list. Type whatever you want for the first list item. Hit the Enter key and message is sent. Previously, when you hit the Enter key, it took you to the next bullet in the list.
However, if you're going to fix this, please fix it properly:
Previously, if you were *not* in a bulleted list and hit the Enter key, the message sent, but if you were in a bulleted list and hit the Enter key, it went to the next line/bullet.
If you were *not* in a bullet list and *did* want to move to a new line before sending the message, you would have to hold Shift+Enter.
This means that to insert a new line in your new message you had to remember which of two different keyboard combinations to use, depending on context:
* Type Shift+Enter if not in a bullet list
* Otherwise just type Enter if in a bullet list
This is not great usability guys.
My preference would be:
To insert a new line, just press Enter - exactly as I am doing in this field to type this message; exactly as I would do if I was in MS Word. This should be the case regardless of whether I am in a bullet list or not.
If you want a keyboard shortcut to *send* the message - *then* you should use Shift+Enter.
Example of attempt to just create a bullet list at present (and for past several months):
