Duplicate posts in the feed

We noticed sometimes there is duplicate posts on the feed, and we took a stab at this sneaky bug because it was so tricky that our dev had to cast a magic spell to reproduce and fix it. Yay! One more bug smashed 🐞 in changelog

Article 1: hashnode.com/post/collaborate-and-contribute-ckto…

Article 2: holladev.hashnode.dev/collaborate-and-contribute