What I expected to happen was...:
To load a 1,13,2 World in the new snapshot.
What actually happened was...:
Certain chunks previously loaded had issues, such as all placed blocks within the chunks reverted back to very first loaded state (i.e.: Paths and all other placed blocks gone, segments of house disappeared). Trees on chunk borders had missing leaves, some completely missing all logs.
Edit: Since this point I've discovered that past a certain point, entire buildings are missing. This makes this issue significantly more important, in my opinion.
Steps to Reproduce:
1. Create a 1.13.2 World.
2. Load the surrounding chunks, destroy/place a bunch of blocks.
3. Load up again in latest 1.14 Snapshot.
4. There should now be chunks reset to originally spawned state.
Cannot reproduce with my own world. Do you have a backup of the world from an earlier version (preferably 1.13.2)? If so, please attach (or provide a download link of) the world here so we can reproduce the issue.
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