### 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.
}
				left_margin += gutters[i].width;
			}
		}
		if (current_hovered_gutter != hovered_gutter) {
			hovered_gutter = current_hovered_gutter;
			queue_redraw();
		}
		if (drag_action && can_drop_data(mpos, get_viewport()->gui_get_drag_data())) {
			drag_caret_force_displayed = true;
			Point2i pos = get_line_column_at_pos(get_local_mouse_pos());
			set_caret_line(pos.y, false, true, 0, 0);
			set_caret_column(pos.x, true, 0);
			dragging_selection = true;
		}
	}
	if (draw_minimap && !dragging_selection) {
		_update_minimap_hover();
	}
	if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll) {
		accept_event(); 
	}
	Ref<InputEventKey> k = p_gui_input;
	if (k.is_valid()) {
		if (alt_input(p_gui_input)) {
			accept_event();
			return;
		}
		if (!k->is_pressed()) {
			return;