I don't doubt that the issue doesn't occur for you, because the "first unread post" feature is specific to each user. Depending on how often we view the thread, my first unread post will be different than your first unread post.

In any case, the issue seems to improving but not yet totally fixed. The link in the Capital One thread above now takes me to post #338 created this morning, even after I read through post #348. Then just a few minutes ago someone posted a new post #349, yet the link still only takes me to #338.