The apt issue might be more widespread. In addition to libinput-bin I found two similar packages on my system:
gtk-update-icon-cache spice-client-glib-usb-acl-helper Both installed automatically as i386 but only depended upon by amd64 packages. I usedcomm <(apt list --installed | fgrep amd64 | sed "s/,.*//" | sort) <(apt list --installed | fgrep i386 | sed "s/,.*//" | sort) -13