Water can get overpressured in a tile for no reason. In the srceen attaced you see a single tile holdung 1500 KG of water while the is no pressure and the water should expand to the tile above.
I've seen this bug reported for gysers in confiend places, but i had this happening in open places with little gas pressure above the tiles and build up to 4000 KG of water in a single tile (damaging adjecient tiles due to overpressuere).
Build a narrow space an let water dripp in. Prevent a flow, tiles above the build-up-tile should never hold water themselves they have to be gas tiels just having water dripping throug them.