If you place a block with water in it (like a trapdoor) in front of a dispenser containing an empty bucket, then activate the dispenser, the block and water will disappear. The bucket in the dispenser gets water but the trapdoor just vanishes.
Quick gif
MC-127906
Dispensers with empty buckets can delete blocks with water in them
Resolved
Duplicate
0
Harry Dunlap
(Unassigned)
Unconfirmed
Minecraft 18w11a
Retrieved
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However, this issue is a Duplicate of MC-126915.
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