When composing an email and copying from MS word the font information and list information is not consistently displayed when the message is actually viewed in the sent folder and the formatting is lost when editing as new.

Steps to reproduce.

Write some text in word and format it with a distinctive font.
Copy and paste into Thunderbirds composer
Original font is displayed in composer.
Send mail to yourself to observe distinctive font is no longer displayed.
Access sent mail and again the font is not displayed.

An copy of the HTML placed in the clipboard by Word is attached to the initial report, a copy of the Thunderbird generated HTML follows

The attachment shows the source of the email that Thunderbird generated which does not display the Lucinda font that the composer does and which displays in the composer.

This would also happen (or does) with version 78?

My initial testing would have been in 78 as that is my daily driver version that is always running.