Printing from iOS

When I print from my iPad to my printer via AirPrint, sometimes a small dialog comes up and displays that data is being sent to the printer, other times the dialog is not displayed (no choices are available in this dialog, it’s just an ack). In both cases, the pages get printed. The second case makes me think that the job didn’t get sent though.

Does anyone else see behavior like this.
iOS 11.3, but I’ve had it in iOS 10 too.