When typing in dates into the data/time component you need to type the full date with leading zero and 4 digit year. In other words you can type '5/12/21', you need to type '05/12/2021'. All other JS date components I have used in my sites allow the "shorthand" for entering, then displays the full 10 digits, which is faster and more natural.
When I am filing out some web form and they make me type all 10 characters, it leaves bad taste in my mouth.