Accents/Special Characters in Input type TextField on Android?

Hello,

It seems that when I add an INPUT TextField on an Android app, and then type an accent(éàù…) or a special char (for example the yen ¥, the euro €, the pound £) with the virtual keyboard, nothing happens, nothing is displayed.

It’s strange because some chars are correctly displayed (like ç or ß) but otherwise, nothing.
Does it happen to anyone else ? Is there a patch or something to do in order to enable those chars ?

PS : All those glyphs are included in the font I use. And they work on Flash.

I use the dev OpenFl and the Android tested is a Galaxy S4 4.4.2.