It’s not the only fault with tracking Blizzard posts.
For example, if you go into this thread in Technical Support…
At the bottom right of the scroll bar, there’s a “Blizz -->” button, which should take you to the next Blizzard post in the thread. Okay, so keep clicking on that and you’ll arrive at this post in the thread…
At that point, the “Blizz -->” button greys out, as if there are no more Blizzard responses after that one in July 2020. However, further into the thread we have…
None of those four posts are found using the “Blizz -->” button, despite them having been made by the same Blizzard posters whose earlier responses in the thread are found using those navigation buttons.
If you scroll to the very last post in the thread and use the “Blizz <–” button to go back to the previous Blizzard post, it takes you back to the post from July 2020, completely bypassing the four I just quoted.