For folks using feedburner, and the feedburner feedsmith plugin:
I was struggling with this issue for a while, but was able to fix the problem without doing any php revisions.
The problem was that in feedburner, I had set my wordpress feed location to https://www.naturalcondition.com/?feed=rss2. For some reason, feedburner doesn’t handle that location correctly, and only grabs the description. I changed the feedburner location of my feed to https://www.naturalcondition.com/feed/ (and https://www.naturalcondition.com/comments/feed/ for comments) and feedburner began grabbing the full-text feed.
I realize not everyone here uses feedburner, but this might help some people.
