Column formatting in modern experience misalignment

When applying the brand new custom column formatting on a date field, the field get slightly misaligned, even no formatting is applied based on the criteria.

Blue lines were added to screenshot for clarity. The first date had no formatting rules, the second one has a formatting rule (but not applied, it should have been red).

The html of the first field is 

<div class="od-FieldRenderer-date"><!-- react-text: 3511 -->1/09/2017<!-- /react-text --></div>

The html of the second field is

<div class="od-FieldRenderer-customFormatter"><div style="color:;" class="sp-field-customFormatter">31/12/2017</div></div>