Based on those logs, I’m not seeing any lookup requests from your Pleroma instance. Could you try searching the blog from there and sharing the logs around that event (if any)? That should tell you whether it’s reaching your WriteFreely instance or not.
I just tested from my Mastodon account, and was able to find and follow your blog. So this could possibly be an issue with Pleroma, or with your Pleroma instance if it has your blog data cached somehow.