System hangs on shutdown after printing "Reached target Shutdown"

Issue

• System hangs on shutdown after printing "Reached target Shutdown"

  ...
  [  OK  ] Stopped target Local File Systems.
  [  OK  ] Stopped Configure read-only root support.
  [  OK  ] Unmounted Configuration File System.
  [  OK  ] Stopped Load Kernel Modules.
  [  OK  ] Unmounted /boot.
  [  OK  ] Unmounted /run/user/0.
  [  OK  ] Stopped target Local File Systems (Pre).
  [  OK  ] Stopped Remount Root and Kernel File Systems.
  [  OK  ] Stopped Create Static Device Nodes in /dev.
  [  OK  ] Reached target Shutdown.
  

• The VMCore of the system shows that the swap is still activated

  crash> kmem -i
                  PAGES       TOTAL   PERCENTAGE
  ...
      TOTAL SWAP  8388607     32 GB   ----
      SWAP USED   0           0       0% of TOTAL SWAP
      SWAP FREE   8388607     32 GB   100% of TOTAL SWAP
  ...