### 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.
ERR_FAIL_COND(p_gui_input.is_null());
	double prev_v_scroll = v_scroll->get_value();
	double prev_h_scroll = h_scroll->get_value();
	Ref<InputEventMouseButton> mb = p_gui_input;
	if (mb.is_valid()) {
		Vector2i mpos = mb->get_position();
		if (is_layout_rtl()) {
			mpos.x = get_size().x - mpos.x;
		}
		if (ime_text.length() != 0) {
			
			return;
		}
		if (mb->is_pressed()) {
			if (mb->get_button_index() == MouseButton::WHEEL_UP && !mb->is_command_or_control_pressed()) {
				if (mb->is_shift_pressed()) {
					h_scroll->set_value(h_scroll->get_value() - (100 * mb->get_factor()));
				} else if (mb->is_alt_pressed()) {
					
					_scroll_up(15 * mb->get_factor());
				} else if (v_scroll->is_visible()) {
					
					_scroll_up(3 * mb->get_factor());
				}
			}
			if (mb->get_button_index() == MouseButton::WHEEL_DOWN && !mb->is_command_or_control_pressed()) {
				if (mb->is_shift_pressed()) {
					h_scroll->set_value(h_scroll->get_value() + (100 * mb->get_factor()));
				} else if (mb->is_alt_pressed()) {