Chat does not allow left/right cursor movement using LB/RB buttons.

When using the chat feature of minecraft (bedrock edition) on Xbox 1 the LB/RB buttons do not let you move the cursor to edit the entered text.

Steps to reproduce:
1) Press Right on D-pad
2) Press A to enter a chat line
3) enter some test " this is borken"
4) press LB to move the cursor back to fix misspelled word /add more text.

Result:
Cursor does not move and stays at the end of the line.

Expected:
Cursor Moves back to the left to edit the text or add more text.