Partially generated structures from older versions can get cut off along chunk borders

The bug

Partially generated structures from older versions get cut off along chunk borders.

To reproduce

1. Open the attached world Test.zip.
   1. Alternatively, open a world in 1.15.2 with the following seed and teleport to the coordinates:

      Seed: -4086024126150179283
      Coordinates: -2100 80 700
      

   2. Close the world and open it in the newest version.
2. /execute in minecraft:overworld run tp @s -2167.50 46.85 702.53 -93.60 30.75.

Expected result

Partially generated structures from older versions would not get cut off along chunk borders.