I've tested, and if a blue wither skull hits any waterlogged blocks like waterlogged leaves and fences, not only the actual block gets destroyed, but the water also is exploded.
MC-259682
The Water in Waterlogged Blocks Broken By Blue Wither Skulls
Resolved
Duplicate
0
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We're tracking this issue in MC-248746, so this ticket is being resolved and linked as a duplicate.
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