Runtime import a texture with german "Umlaut" (ä, ö,ü) on iOS

Hi,

I want to import a texture from file with www class on Mac / iOS.
When my texture contains a german umlaut, like fläche.jpg, the name of the file is not read correctly.

In the screenshot you can see the result of the filename copied in a Text-Object and also see the console:
First line is the filename (slightly wrong).
Second line is char nr 2
Second line is char nr 3

The ä is converted into something strange like a" .

Because of this my texture is not read from file.
What can I do?

This is probably relevant