The bug

In 1.13 (and possibly some versions afterwards) the "Render Distance" values loaded more chunks than in current versions.

This might be the same bug as MC-152198.

How to reproduce

Run the following commands in 1.13 and in the current version.

1. Set the "Render Distance" to 6
2. Make sure you are neither near spawn nor in force loaded chunks
3. Run the following to verify that spawning entities in unloaded chunks fails

   /summon armor_stand ~200 ~ ~
   

   It fails in 1.13 and in the current version as expected

4. Run the following to check if the chunk 6 chunks away is loaded

   /summon armor_stand ~96 ~ ~
   

   It succeeds in 1.13, but fails in the current version