Using New Outlook on Windows for personal email, calendar, and contact management
New Outlook asked me about my opinion and if I had any issues so I wasn't shy to raise this to the Support team. After sending them a recording of how copy/paste of signature doesn't keep formatting, I got the following feedback:
As per the concern, we have been taken this information to our engineering team and they have found the known problem in the product*. Thank you for bringing this to our attention, at this point in time we have no final date available as it is too early in the process, hence* ETA is still unknown*.*
For now, a workaround is to manually resize the image (click on the image in the signature editor, click on one of the corners and drag it) and it should take the original formatting.