Steps to reproduce the issue

Open an admin form with date field (i.e. an existing article)
Go to the Publishing options
Make sure there is a date value selected for Start Publishing and Created Date.
If not set these date fields and save the article.
Click into the input field of the Created Date option then.
Press the enter key

Expected result

Nothing should change with the selected dates visible in Start Publishing and in Created Date

Actual result

Input of Start Publishing is cleared.
(It is always the input of the first date field in the form that is cleared)

System information (as much as possible)

Joomla! 3.7.5
Php 7.1.7 on local XAMPP (as well as PHP 7.0.22 on productive webserver)
Chrome 60.0.3112.113 (Offizieller Build) (32-Bit)

Additional comment

Tested also on Firefox 42.0 with the same result.