### 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.
if (clear_button_enabled == p_enabled) {
		return;
	}
	clear_button_enabled = p_enabled;
	_fit_to_width();
	update_minimum_size();
	queue_redraw();
}
bool LineEdit::is_clear_button_enabled() const {
	return clear_button_enabled;
}
void LineEdit::set_shortcut_keys_enabled(bool p_enabled) {
	shortcut_keys_enabled = p_enabled;
}
bool LineEdit::is_shortcut_keys_enabled() const {
	return shortcut_keys_enabled;
}
void LineEdit::set_virtual_keyboard_enabled(bool p_enable) {
	virtual_keyboard_enabled = p_enable;
}
bool LineEdit::is_virtual_keyboard_enabled() const {
	return virtual_keyboard_enabled;
}
void LineEdit::set_virtual_keyboard_type(VirtualKeyboardType p_type) {
	virtual_keyboard_type = p_type;
}
LineEdit::VirtualKeyboardType LineEdit::get_virtual_keyboard_type() const {
	return virtual_keyboard_type;
}
void LineEdit::set_middle_mouse_paste_enabled(bool p_enabled) {