The issue is that the water hitbox is a 3x3 radius, instead of 1. This video shows the bug in Minecraft. --> https://1drv.ms/v/s!Aosj3tm3y-bsg_ImWxHBi4P6nd1_iw?e=wRGvhB
Steps to reproduce:
1. place a water bucket down, in any place
2. stay exactly a block outside of its reach
3. you will see that you can float in the air even though there isnt any water in the block area.
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We're tracking this issue in MCPE-148506, so this ticket is being resolved and linked as a duplicate.
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