@ Willy, under Software & Updates > Updates tab did you have Notify me of a new Ubuntu version set to For LTS only or For any new release? If it's still set for LTS only that may explain the failure.
@ Willy, under Software & Updates > Updates tab did you have Notify me of a new Ubuntu version set to For LTS only or For any new release? If it's still set for LTS only that may explain the failure.