I found a temporary workaround, initially I was trying a try-catch like this:
 
	//            $output = call_user_func_array('sprintf', $args);
              try { $output = call_user_func_array('sprintf', $args); }
              catch(ArgumentCountError $e) { }
	
	However it didn't work. But this did:
 
	//            $output = call_user_func_array('sprintf', $args);
              try { $output = sprintf($args[0], $args[1], $args[2]); }
              catch(ArgumentCountError $e) { }
	
	 
 
	EDIT: Ok the following works too, just needed a backslash ?
 
	//            $output = call_user_func_array('sprintf', $args);
              try { $output = call_user_func_array('sprintf', $args); }
              catch(\ArgumentCountError $e) { }