Hi Justin,
I’m sorry to hear you are having issues. I do have a plugin update to release soon but it is mainly to enable compatibility with more printer models and I don’t think it will help your case.
We haven’t seen the same issue in testing which makes it difficult to comment on, but I can explain a little about how the plug-in works which may help narrow down the possibilities.
Currently, the plug-in generates a print job by hooking in to the WooCommerce “Thankyou” event. This event triggers our code whenever the “Thank you for your order” message is generated and shown to the user. Therefore any method of generating an order that does not cause this event to fire would also not cause a print job. Usually this is only something that could be done by an admin through the WooCommerce management interface, it’s not something that can be done by a typical customer. But is it possible that this could be related to your situation?
Perhaps using different language web browsers can in some way interfere with the triggering of this event. We can test that on our side.
I am not the original developer but am looking in to alternative methods of triggering the print job. I would like to fix this as a priority, have you been in contact with our support team at all?