Passing in a number value will cause the native vue input component to throw a warning in the browser console.
"Invalid prop: type check failed for prop "value". Expected String with value "1", got Number with value 1"
No warning should be thrown when passing a number value as it's considered a valid type in the api documentation.
Also the defaultValue should have the Number type valid as well.
Url of example:
Might be related to this issue in core