### 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.
select_all();
				pending_select_all_on_focus = false;
			}
			show_virtual_keyboard();
		}
		queue_redraw();
	}
	Ref<InputEventMouseMotion> m = p_event;
	if (m.is_valid()) {
		if (!text.is_empty() && is_editable() && clear_button_enabled) {
			bool last_press_inside = clear_button_status.pressing_inside;
			clear_button_status.pressing_inside = clear_button_status.press_attempt && _is_over_clear_button(m->get_position());
			if (last_press_inside != clear_button_status.pressing_inside) {
				queue_redraw();
			}
		}
		if (m->get_button_mask().has_flag(MouseButtonMask::LEFT)) {
			if (selection.creating) {
				set_caret_at_pixel_pos(m->get_position().x);
				selection_fill_at_caret();
			}
		}
		if (drag_action && can_drop_data(m->get_position(), get_viewport()->gui_get_drag_data())) {
			drag_caret_force_displayed = true;
			set_caret_at_pixel_pos(m->get_position().x);
		}
	}
	Ref<InputEventKey> k = p_event;
	if (k.is_valid()) {
		if (!k->is_pressed()) {