### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
caret_wrap_index = 0;
		}
	} else {
		if (caret_wrap_index == 0) {
			p_new_line--;
			caret_wrap_index = get_line_wrap_count(p_new_line);
		} else {
			caret_wrap_index--;
		}
	}
	
	if (p_new_line < 0) {
		p_new_line = 0;
	}
	if (p_new_line >= text.size()) {
		p_new_line = text.size() - 1;
	}
	p_new_column = _get_char_pos_for_line(p_last_fit_x, p_new_line, caret_wrap_index);
	if (p_new_column != 0 && get_line_wrapping_mode() != LineWrappingMode::LINE_WRAPPING_NONE && caret_wrap_index < get_line_wrap_count(p_new_line)) {
		Vector<String> rows = get_line_wrapped_text(p_new_line);
		int row_end_col = 0;
		for (int i = 0; i < caret_wrap_index + 1; i++) {
			row_end_col += rows[i].length();
		}
		if (p_new_column >= row_end_col) {
			p_new_column -= 1;
		}
	}
}
void TextEdit::_update_placeholder() {