TextEdit (RichText) with RTL text: cursor UP malfunctioned after <br> inserted

please, see main.qml attached.

1. RTL text is inserted into TextEdit (with RichText format)
2. Cursor is shifted in the middle of the text.
3. "<br>" tag is inserted
4. UP arrow is pressed on keyboard

Expected result: cursor must go on the upper line

Actual result: cursor stays on the bottom line

Note: for LTR text all works as expected.

Note2: cursor moving with < or > works good, and after they are pressed - moving UP also works. But right after <br> inserted - it doesn't work.