No problem. No fear of the roast burning - I've got a very close eye on it 
I think I've found the issue, but in going to have to refer it to an engineer and come back to you.
My suspicion is the other tag on the invoice. As spaces are replaced with dashes, and your previous tag ends with a dash, I'm wondering if that's causing the issue.
Bear with me, and someone will come back to you shortly. For now, I've changed this to a bug.