Gas Permeable Tile Leaking Water!!!

Steps to Reproduce
I had a rather large pool of clean water that I wanted to keep from spilling out as I was mining my Base out and expanding. So before I messed with the water I build a gas permeable pool under it so I could tunnel down from above and hollow it out and keep all my water. before I even started digging out the pool, the rocks adjacent to the gas permeable tiles started cracking and this for some reason sent all that water spilling out the other side of the gas permeable tiles and spilling out all over the area below. I prioritized mining out the adjacent blocks to stop the slow leak. As my dupes actually cleared the blocks adjacent to the gas permeable tiles, water literally just spilled out, every last drop of the body I was trying to contain spilled out below. the floor below that had gas permeable tile retained it just fine.....​​​​​​​​​​​​​​