Since some months, and the update to a (new) Moodle version, it's difficult to find (new) not read messages in "Plugins traffic" forum, when they are in old threads.
Previously, we add a "Not read" clearly written, and searchable. Now you only have a number with a red background... and it's not directly searchable. So you have to scroll and look visually for something red...
Hope something can be done to improve that (in this forum, but perhaps certainly for this Moodle forum type in general).