I host a BDS server on Aliyun using docker. I didn't specify server version and keep it up-to-date with Mojang latest release, since some players are using Windows 10 version which cannot launch specified versions.

The server was running on 1.14.60 before issue happened. I can under stand some sharp change with chunk biomes caused by version upgrading, but the issue is that new generated biomes are all stone.

Unlike java version, I can't use F3 to confirm what biome is generated in those chunks, so all information I can provide is as above, and some images that how those chunks looks like.