I can't add ss due of jira errors! Actualy this report is about buggy seed - At the seed 5622198261555030430 at 690 y -528 we can find frozen and frozen deep ocean next to desert and at 670 y -605 we can find snowy plains named as frozen ocean biome next to desert island in the middle of frozen ocean
Linked issues
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For the desert part, thats just how it generated, for the snow biome, im not sure but i suppose that is an error.
Duplicates MC-126009
Not sure if it's a bug since warm biomes still have a chance to spawn near cold biomes. It does seem strange though that cold oceans spawn near warm biomes and warm oceans spawn near cold biomes. (I've experienced this with each ocean I've found)