Several buckets such as the Powder Snow Bucket are entirely consumed when used as a crafting ingredient. The craftingRemainingItem has not been set to an empty bucket for these bucket variants like it has been for lava/water/milk buckets.

The following buckets are affects

• Powder Snow Bucket
• Pufferfish Bucket
• Salmon Bucket
• Cod Bucket
• Tropical Fish Bucket
• Axolotl Bucket

I've included a datapack with a recipe that confirms this. The recipe is 8 stone surrounding a powder snow bucket.