Placeholders disappear when form is submitted issue in SAFARI

I need help fixing a bug in SAFARI. I created a custom theme and the form works fine in all browsers. However, when i submit the form in SAFARI, the placeholders all go away. If I hover over the fields they come back.

See example of issue: https://gyazo.com/cf66e9730426f78c7839eaa6720a4323

Any ideas ?

Thanks in advance guys !