After upgrading to the latest version of Thunderbird ( release 141.0), I noticed an issue in the message list window: the horizontal scrollbar at the bottom appears very close to the last visible email in the list (which is usually the most recent message, depending on the sort order). In some cases, the scrollbar even overlaps the subject line of that last email. This often makes it difficult or even impossible to click on the email, as the scrollbar covers a large portion of its title.
This issue occurs when the "Quick Filter" feature is enabled. If I disable "Quick Filter," a proper space appears between the last email's title and the scrollbar, and the issue no longer occurs.
