Thanks for reaching out.
It's not due to the customization you added from that thread. Have you added some customization related to global query? Because even with posts meta, the information is displayed differently than the content.
And that's a description from https://sharing-cake.com/gluten-free-vegan-dark-chocolate-cherry-almond-porridge/
Hence, it's not because of the list, but the information pulled from the main post itself. I recommend removing your customization and test it again (but make sure to back them up). And do a plugin test, you can do this by deactivating all third party plugins, and seeing if the problem remains. If it's fixed, you'll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Let us know how it goes!