After transferring the world from snapshot 24w33a to 24w34a, when playing in survival and using a bucket of water/lava, or an empty one, it will disappear, leaving behind liquid (or remove it if the bucket was empty) with milk this does not work, with powdered snow the same way, after them buckets remain, which if used for their intended purpose, having collected water or lava, they will disappear just like the others.
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We're tracking this issue in MC-275757, so this ticket is being resolved and linked as a duplicate.
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Can confirm.