It has not been fixed "before the end of May" During this time Microsoft has released 2 updates for Windows 10 version 1803, KB4100403 on 5/25/2018 and KB4284835 on 6/12/2018. I installed both on my PC and reinstalled the Canon drivers from the web site, and it still gets stuck on network printing to my Maxify MB5120 "Creating print data". The PC that I reverted to the older 1709 version of windows 10 prints fine.
I am going to try to re-open my support request to Canon.
I am going to try to re-open my support request to Canon.