That seems a question for Apple and/or HP. I don't think it's something you can solve yourself.
With the update to IOS 11 printing from an updated iOS device to an HP Officejet Pro 8600 results in a tiny print in the top left hand corner of the page.
If I print from an IOS device that hasn’t been updated it prints normally. I can also print successfully from an IOS 11 device to my Canon printer.
Any others with this problem? Any solutions would be appreciated