Double tray printer will print only first page if Tray 1 or Tray 2 selected, prints all pages if Automatic tray selected.
Only way to print multi page document while using automatic tray is to select print current page option and print pages one by one, or other combinations of options applications and configurations result in printing only one page
Printer should print whole documents and did so few cups updates back (about year or two ago) probably before 2.x release
Issue is not related to systems as it happens across different os
slackware current
kubuntu lts
endeavouros mercury neo
Issue independent of application used to print the document
Printer Canon Maxify MB2750