string - QML Javascript "console.log" with UTF-8 -

as know in qml javascript can log console calling 'console.log' function.

however, per experience, can't log utf-8 strings console strings still in proper characters, replaced question marks.

for example:

console.log("xxxaàáảãạyyy");

will become (in console):

xxx??????yyy

how solve problem? know console debugging can use latin, anyway, full utf-8 support more interesting.

my console show them fine.

i guess problem not qml, console can't handle utf-8 characters.

And