It seems I was mistaken when reading the wiki and didn't look closely enough at the .json hierarchy. Oops. My bad.
This issue can be replicated by using commands and teleporting around. It's inconsistent, but I was able to produce this a couple of times on my own without looking any of these up. Hope this issue can be fixed.
Edit: Does it have something to do with chunks? After reading more I realized it might be the distance I was flying and teleporting back. I would teleport myself to 0 256 0 and fly down. It was inconsistent because I would fly different distances every time.
Issue still persists in 1.14.3-pre3