"needs-restarting -r" doesn't report the system has to be rebooted after important updates such as the kernel or systemd

Issue

• After updating the system, which caused a new kernel or a new systemd package to be installed, the tool doesn't report the system has to be rebooted

  # yum -y reinstall systemd
  [...]
  # needs-restarting -r
  [...]
  No core libraries or services have been updated since boot-up.
  Reboot should not be necessary.
  

• After updating the system which caused a new kernel or a new systemd package to be installed and rebooting, the tool continues to report the system has to be rebooted

  # yum -y reinstall systemd
  [...]
  # reboot
  [...]
  # needs-restarting -r
  [...]
  Core libraries or services have been updated since boot-up:
    * systemd
  
  Reboot is required to fully utilize these updates.