MYOB emails changing format when administrator is logged in

Since the October update we've had an issue where emails sent from MYOB through Outlook are now plain text without the senders signature, however this is only when the administrator is logged in.  When they aren't logged in it works fine and sends it in the default format set up in Outlook.

I've seen threads where others have had issues, anyone else seeing it in this same manner?  Doesn't seem to be an issue with settings or other software as it can work just fine, even without the user logging out or doing anything at all aside from waiting for the admin to no longer be logged in.

Currently on 2023.3.1.12 build and still having the same issue.