Several cases of random, isolated blocks of water generating underground

These may just be coincidences and be tiny shards of normal flooded caves, but they also may possibly be springs which have no connection to an adjacent air block but generated anyway. If the latter, this is a bug.

Seed: 1
Coordinates: /execute in minecraft:overworld run tp @s 502.50 -23.62 -303.50 -22.45 30.70