"Invalid date" replaced the correct date value in my showsingle.tpl

[Doppy]

The problem is that when I reload tpl page, I view the correct data for one instant and after the date value are replaced about "invalid date" . It not a problem about my controller.js because it sends the correct values to my tpl page.
This is the hmtl code problem is:

<small class="hidden-xs"><span class="timeago" title="{element.title}" datetime="{element.datatime}">{element.text}</span></small>

[baris]

Does it work with just this

<small class="timeago" title="{element.timestampInISOFormat}"></small>