Confirmed issue. Failure to print consistently to Canon imageRUNNER ADVANCE C5550i from clean install Mac OS Big Sur November 2020 release. ERROR: invalidfont OFFENDING COMAND: xshow Queue: Direct IP Printing Driver:Canon Ir-ADV C5550/5560 III PS 4.17.5 PSv4.17.5Mac.zip 11/20/20 38.7 MB Applications: MacOS Previews, Safari, Google Chrome Source: PDF of any type, Google Docs