Related Posts Hook

For some reason, my related posts plugin is showing up in my sidebar but only on posts, not my home page. It just recently started happening. I thought maybe it was the plugin, so I tested a different plug in and it is doing the same thing. Can someone help?

Example page below:

Spring Safari Free Printable Planner Stickers | Mini Van Dreams

The page I need help with: [log in to see the link]