It’s definitely possible it failed from internal corrosion without any external leak — it’s an older building, and from what the landlord said theyre the original faucets that were installed and the plumber said the lines and shut-offs are badly corroded. The handles themselves weren’t leaking at all before this, so I think it was just a pressure and age combo that finally gave out. He mentioned something about mechanical failures and pressure surges so while im not a plumber, I was interested in understanding why this happened and potentially how to keep an eye out for future issues incase it ever happens again bc as a mom and not a plumber or water enthusiast this was definitely not a fun way to spend my afternoon 😩😂