User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.2 Safari/605.1.15

Steps to reproduce:

Happens all the time.

Actual results:

Updated to CATALINA 10.15, today. After updating UNREAD Emails Subject Line are no longer bolded, making discerning READ vs UNREAD more difficult.
Interestingly enough;

1. the INBOX is bold when unopened emails are in Inbox,
2. Unread indicator is STARRED when unread and UNSTARRED when read,
3. Moving unread emails between folders causes the new folder to become BOLD.

Yet, incoming Subject lines no longer BOLD, regardless.

This seems to be a very common complaint now that folks are updating to the new Catalina 10.15 release.

Expected results:

Email Titles should be bold when UNREAD.

Try TB 68.1.1, that apparently works.