### 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.
x_ofs = MAX(style->get_margin(SIDE_LEFT), int(get_size().width - text_width - r_icon->get_width() - style->get_margin(SIDE_RIGHT) * 2) / 2);
			}
		} else {
			x_ofs = MAX(style->get_margin(SIDE_LEFT), x_ofs - r_icon->get_width() - style->get_margin(SIDE_RIGHT));
		}
		ofs_max -= r_icon->get_width();
	}
	
	Vector2 primary_caret_offset = get_caret_pixel_pos();
	if (MIN(primary_caret_offset.x, primary_caret_offset.y) <= x_ofs) {
		scroll_offset += x_ofs - MIN(primary_caret_offset.x, primary_caret_offset.y);
	} else if (MAX(primary_caret_offset.x, primary_caret_offset.y) >= ofs_max) {
		scroll_offset += ofs_max - MAX(primary_caret_offset.x, primary_caret_offset.y);
	}
	scroll_offset = MIN(0, scroll_offset);
	queue_redraw();
}
int LineEdit::get_caret_column() const {
	return caret_column;
}
void LineEdit::set_scroll_offset(float p_pos) {
	scroll_offset = p_pos;
	if (scroll_offset < 0.0) {
		scroll_offset = 0.0;
	}
}
float LineEdit::get_scroll_offset() const {
	return scroll_offset;
}
void LineEdit::insert_text_at_caret(String p_text) {