### 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.
return highlight_current_line;
}
void TextEdit::set_highlight_all_occurrences(const bool p_enabled) {
	if (highlight_all_occurrences == p_enabled) {
		return;
	}
	highlight_all_occurrences = p_enabled;
	queue_redraw();
}
bool TextEdit::is_highlight_all_occurrences_enabled() const {
	return highlight_all_occurrences;
}
void TextEdit::set_draw_control_chars(bool p_enabled) {
	if (draw_control_chars != p_enabled) {
		draw_control_chars = p_enabled;
		if (menu) {
			menu->set_item_checked(menu->get_item_index(MENU_DISPLAY_UCC), draw_control_chars);
		}
		text.set_draw_control_chars(draw_control_chars);
		text.invalidate_font();
		_update_placeholder();
		queue_redraw();
	}
}
bool TextEdit::get_draw_control_chars() const {