Micro river bima in badlands

 

What I expected to happen was...:
Rivers are a biome that is generated everywhere and on their banks there are always small amounts of grass, but in biomes such as deserts or badlands it should not be like that

What actually happened was...:
In the badlands biome, a river biome has been generated that is too large, which should not be the case, but ... this could be considered an oasis