Creating a floating island or cave world type continuously spams "Empty height range: [136 absolute-0 below top]" in the output log

The Bug

Creating a single biome floating world type or cave world type continuously spams "Empty height range: [136 absolute-0 below top]" non stop. Below is a zip folder of a log output created by just creating a floating island world type.

Reproduce

• Launch the game with the output log enabled
• Create a floating island world type or cave world type
• Look at the output log
  Notice the non stop spam of "Empty height range: [136 absolute-0 below top]"