New chunk generation glitched

As you can see on the screenshot, the new chunks generated are completly glitched.

The biomes are completly different from the originals. And even in the middle of the new chunk generated, there is a lot of glitchy chunk (like the one with nether portal in the screenshot, who it's completly different of the rest of the new chunk generated).

 

Just to precise, I got this bug on a bedrock server. I tested it in local, and the generation seems to work.