input type="datetime-local" with pre-set value fail validation on certain browser

[Dunge]

Demo:
http://jsfiddle.net/XeUcM/68/

Change the date and press the Pause (submit) button.
The validation procedure fail and a popup appear saying the entered date is invalid.
It works if no value is preset in the dom.

Works on:
Desktop Chrome
Desktop Firefox
Mobile Firefox

Fail on:
Mobile Chrome
Mobile Safari

Any workaround?

[Dunge]

Submitting via javascript seems to bypass the validation