Qt wasm bug unexpected behaviour virtual keyboard

I am developing Qt Wasm application and i noticed a bug when running on Android system browser (in my case i tried on Vivaldi for Android and Opera; on both i got the same result). When i inserting text via virtual keyboard into my little costumized version of QML TextArea field in some case words duplicate when i press space key or when i press keyboard part which shuldnt added text character inside textarea and in some cases when deleting text from it when i press delete button actually first inserts text which i typed before and just after that  start deleting text from textarea field. i noticed this behaviour on Android system; i didnt tested on iPhones so i dont know if a bug afects iOS too; but on desktop (tested only on Linux Fedora) app works as expected.