Deep puddles

How much of an issue are deep puddles on an EV? Drove through one with my EV6 which caused a sound like sloshing water coming over the speakers which was a bit on the nose, but anyway, drove it home and it behaved normally. Let it sit overnight and upon restarting, it made the noise until I pointed it up hill. Then it instantly stopped. It's fine now. Just wondering how dangerous this is or isn't.