QString inputMask;
for(int i =0;i<bytesCount;i++){
    inputMask+=tr("HH ");
}
inputMask.remove(inputMask.length()-1,1);
inputMask.append(tr(";0"));
lineEdit->setInputMask(inputMask);

When I pressed "End" button on the keyboard,when lineEdit is focused, cursor doesn't go to the end of input field. Possibly, it calculates quantity of mask symbols 'H', and go to the position == count of 'H', but doesn't calculate space separators.