I had a survival world with commands enabled in version 1.21.1, and when I opened it in snapshot 24w34a, I started playing on it. At some point, while trying to free myself from powdered snow with a water bucket, the bucket disappeared at the same moment I placed the water source. After some testing, I noticed that everything worked fine in creative mode, but as soon as I switched back to survival mode, no buckets worked. If I tried to place or pick up any liquid in survival, the bucket would immediately disappear. This doesn't happen with powdered snow, which I can place normally, but as soon as I try to pick it back up, my bucket disappears too. I discovered that this bug also occurs in a world created directly in this snapshot, but everything works correctly with milk buckets.