I don’t know about anyone else, but in my house this is now a well-recognised developmental stage.
It starts with the baby wanting to drink untold quantities of water at night. And continues with the baby wanting to drink untold quantities of water at night. He asks for a drink before lights out, lies down, drinks milk, asks for water, asks again as soon as the cup is put away or the bottle is closed, lies down and wriggles a bit then asks for more water… and it happens night after night potentially for weeks.
With my oldest I was genuinely worried about why he had suddenly developed a need to drink so much water.
With my second I know he’s playing me.