The cursor position does not go back one character after exiting the replace mode

# Reproduce
- Open a new terminal.
- Input the content as below.

```zsh
abc
```

- Put the cursor at the "b".
- Enter normal mode and press `R`.
- Press `<ESC>` to exit the replace mode.

# Result
The cursor is still at `b`.

# Expected behavior

The cursor should be at `a`.