The New December updates for the scanner software and driver fix the problems ... as long as the older versions of the software on your Mac are removed/deleted. I had to manually remove the files from my system as the Canon install applications did n...
I have this exact same problem for the IJ Scan utility using my MG5520. I've downloaded all of the latest print & scan drivers and the latest scan utility ... and applied all of the latest MacOS updates for MacOS Catalina 10.15.1.
