World file bloated from 2MB to 43MB for no apparent reason.

Partner Rank: 2

Verification build: 1.16.100 Holiday 7
Regression build: Also 1.16.100 Holiday 7?? For sure wasn't an issue in 1.16.100 Holiday 6

Summary: World file bloated from 2MB to 42MB for no apparent reason.

Impact: Having the world so bloated makes it less appealing on smaller storage devices. This amount of world bloat can also cause other unknown issues.

Repro:

1. Download holiday.bloat.zip from jigarbov slack
2. install it in your files, it includes 2 worlds and some dev rp/bp
3. note the world size disparity

Observed result: The bloated world is massive 42MB though there is no apparent reason why. The other one is only 2~MB and has roughly the same block layout in world.

Expected result: Both worlds should be roughly the same size since they are very similar.

Screenshots attached (above)