Cold rivers generate only near ice plains biome. But when river come through or go near other cold biomes it doesn't make frozen. It stays warm. It can be seen using the AMIDST program.
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is duplicated by 3
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Not sure why it wasn't marked works as intended or can't duplicate, but I think that's where they are going with this.
This bug is still occurs in minecraft though nothing said in gamepedia or other official sources that its must be that way. Please fix this mistake
Proposal to re-open this ticket; it's been 6 years since it was closed. The likelyhood that this is no longer Won't Fix after Update Aquatic and the addition of other frozen ocean biomes is pretty high (in my opinion).
Please provide seed and coordinates.