Why does my queue event delay not working

I need your help.

I'm working with Laravel 5.5 queue and with Linux supervisor tool (Exactly like it the documentation)

Now I have a very weird issue.

When I use this command without delay

event(new NewOrderHasBeenPlaceEvent($get_order_details, $tran_id, $customerDet->phone));

It's working fine.

But when I use the delay option

 event(new NewOrderHasBeenPlaceEvent($get_order_details, $tran_id, $customerDet->phone))->delay(Carbon::now()->addMinutes(5));

I got an error: Call to a member function delay() on array but queue has been executed as expected.

I tried to google but nothing can be found, this got me stuck for whole day. Thanks in advance.

via Chebli Mohamed