Uploaded image filepaths not working

Hi all, I have a Gatsby netlify CMS site at swapstack.co; I am having an issue with blog post featured images getting uploaded correctly.

When I create a blog post and upload a new ‘featured image’, it gets saved into the destination I would like it to. See an example here.

The problem is in the index.md file, the reference doesn’t appear to understand that the file exists in the same parent folder. See here (this is from another example post that I created to demonstrate the issue, but I deleted it so that it would not be live on my site):

How can I fix this? I need the index.md files to understand that the filepath is relative to the folder it is already in.

Thank you!