I went to the seed 1669320484 and what I saw was a huge ravine extending to the Far Lands. The C++/Java code algorithm said so.

What actually happened was: A Huge ravine sticking out until the Far Lands.

Steps to reproduce: 

1. go to seed 1669320484
2. /tp @s -3439 100 2148
3. Enjoy the endless ravine, I guess. Note*: This only affects Bedrock and Education editions ONLY.*