Text Tranform Uppercase - Greek Accents

Hello,

On my desktop, the handling of greek accents on Uppercase Transform is working great, meaning that the accents disappear.

On my ipad, iphone the accents won't disappear.

How could I fix that?

Thank you in advance.

Could you please post an url to your site?
Could you please be more precise (some screenshot might be handy).

Thank you for the reply.

http://herbatest.gr.188-40-48-203.linux22.papaki.gr/

Screen Shot 2015-06-07 at 12.00.10.png

IMG_0063.png

I'm not entirely sure where is the catch... I guess it might be caused by different system "Open Sans" font that is used in ipad/iphone compared to desktop one