Date field marked as mandatory is not validated on submit

[aguyfromdenmark]

If you add an "answer" of the type "Date" to your form, mark it as mandatory, and then submit the form without picking any date, the validation does not fail on the date field.

Reproduction

Specifics

I have experienced this on both Umbraco Forms v.9.4.1 and v10.0.4.
Both sites running on Cloud.

Steps to reproduce

1. Add an "answer" of type "Date" to a form.
2. Mark the "answer" as "Mandatory"
3. Submit the form without changing the date field.
4. The validation will not mark the date field as invalid.

Expected result

The empty date field will throw a validation error on submit, preventing the form from submitting.

Actual result

Nothing. The date field still says it's valid.

[AndyButland]

Thanks, yes I can replicate this server-side (client-side validation seems to work as expected), and see why it's happening. Will get this fixed for the next release.