Water and the blocks are not entangled properly, To match reality, water should be pushable but not pullable. Here's a list of proper interactions. Water can be contained in a fence surrounded by blocks and disappear when it should have logically been contained and moved in it's container.
Sticky piston facing east into waterlogged stair block facing east: water is both pushable and pullble.
Sticky piston facing east into waterlogged stair block facing north/west/south: water is pushable but not pullable.
Sticky piston facing down into bottom half waterlogged stair block: water is both pushable and pullable.
Sticky piston facing down into water source block: water is pushable not pullable
Sticky piston facing into water source block facing east/west/north/south: water is pushable not pullable.
Sticky piston facing up into water source block: water is pushable and pullable
Sticky piston facing down into bottom half waterlogged slab: water is both pushable and pullable. (though this could also be considered an illogical interaction anyway.)
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We're tracking this issue in MC-130183 and MC-130202, so this ticket is being resolved and linked as a duplicate.
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