I do not know if that a bug but I am following the game and I didn't see the last post on my Itch feed page.
I had to open the Gameover page here to see the news about the game.
I had unfollow and follow back checked last month and didn't found that too even the one hours ago. None in last 170 days in my feed.
Unless that maybe set as private accidentally if not hope that bug only in my way.
But I just thought that maybe that not happening only with me because lack of comments in the last posts. At least normally I always see at least one comment in post of most games.
Just got worry if your followers got same problem.
If only with me I may contact Itch suport to ask about a bug in my feed.
Anyway wish a good time with the development of your game there.