Invoice not attached to form submissions

We have a new issue with invoices not coming through attached in the notification emails for one of our forms.

Most recent example is

Submission ID 5894856556061854041

It is attaching to the client email, but not to our notification email. I have checked and it is set up correctly

Hello tom_tkg,

Thanks for reaching out to Jotform Support. I can see that this is very stressful. Rest assured, I’m here to help. When I cloned and tested your form, everything worked the way it was supposed to. Take a look at the screenshot below to see my results:

I've cleared your form cache. Can you please test your form to see if it makes any difference? If the issue persists, I suggest deleting the existing Notificatiuon Email and adding it again.

Give it a try and let us know how it goes.

Thanks. It's a form that requires payment by credit card so we will need to just wait for the next order to come in to check. I will delete and re-add the emails as you suggest