On chunk borders, snow piles up higher compared to the other blocks. This created rows of 1 block tall snow layers that go pretty far in my world. The rows eventually end, but they look really weird and unnatural. I believe this was caused due to a chunk lighting glitch, but I am not entirely sure.
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Thank you for your report!
We're actually already tracking this issue at MCPE-73468, so I will resolve and link this ticket as a duplicate.
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