After 2020 Wave 1 upgrade, When we select the text where there are different font and different sizes, it still says it’s all Segeo UI 12 (or the font/size of the 1st word in the email body if not for Segeo UI 12 text). Ideally it should show blank on the email font and size fields because it is not entirely of the same font and size. This is impacting user experience in working with emails.

Microsoft ticket has been raised and suggested to raise an idea for its resolution - 120040123002001.