Liquid leakage occurs when a submerged Falling Tile drops next to an Airflow Tile

I observed liquid leaking through an Airflow Tile as follows. 

Falling Tiles exist inside a body of liquid, and an Airflow Tile is placed next to the tile that is supporting those Falling Tiles (hereafter “the support tile”).

To make room for digging the support tile, I dig out some cells below the Airflow Tile.

When I dig the support tile in this setup, the Falling Tiles drop, and each time they drop, liquid leaks into the empty space I created.

The amount of leaked liquid is not consistent.Even when repeating the same action in the same save file, sometimes only a small amount leaks, and sometimes a large amount.This suggests that the leaked amount varies depending on internal timing.