RHEL8: Tang socket doesn't start at boot randomly

Issue

• Even though tangd.socket is enabled, the socket is not initialized during boot

• The console shows Ordering cycle found message when processing sockets.target unit

  [...] systemd[1]: sockets.target: Found ordering cycle on tangd.socket/start
  [...] systemd[1]: sockets.target: Found dependency on tangd-keygen.service/start
  [...] systemd[1]: sockets.target: Found dependency on basic.target/start
  [...] systemd[1]: sockets.target: Found dependency on sockets.target/start
  [...] systemd[1]: sockets.target: Job tangd.socket/start deleted to break ordering cycle starting with sockets.target/start
  [ SKIP ] Ordering cycle found, skipping Tang Server socket
  [...] systemd[1]: Stopped Switch Root.
  

• The journal shows systemd broke an ordering cycle to be able to reach sockets.target unit

  # journalctl -b -p warning
  [...]
  [...] systemd[1]: sockets.target: Found ordering cycle on tangd.socket/start
  [...] systemd[1]: sockets.target: Found dependency on tangd-keygen.service/start
  [...] systemd[1]: sockets.target: Found dependency on basic.target/start
  [...] systemd[1]: sockets.target: Found dependency on sockets.target/start
  [...] systemd[1]: sockets.target: Job tangd.socket/start deleted to break ordering cycle starting with sockets.target/start
  [...]