Cursor locks to wrong side in RTL text

When you input text and add a lot of trailing spaces to wrapped text, the expected behavior is that the cursor stops moving when you've reached the end of the line, ignoring the spaces. This works for LTR text, but when you input RTL text in a QTextDocument and add trailing spaces to a line, the cursor will lock to the beginning of the line instead.

Can be reproduced with text edit demo.