It wasn't a limitation in your system a while ago.  A while ago, I didn't have to have a "Pay Invoice" button on my invoice when I downloaded the pdf.  Something on your side changed it and now my invoice is forced to have a button that doesn't actually work.  That's a poor customer experience that I can't change because QBO has hardcoded the button into my invoice.  This is very disappointing and appears to be done to push me into using your payment system, which I don't want to use nor do I want my customers to think they can pay online.

Someone needs to fix this so I can make my invoice look like I want it to look like.  You can give me the option to have your payment system, but you shouldn't be forcing it on us.