Warning: "Stopping rpcbind.service, but it can still be activated by: rpcbind.socket" is shown when stopping rpcbind

Issue

• When stopping rpcbind.service, the following warning is shown

# systemctl stop rpcbind.service
Warning: Stopping rpcbind.service, but it can still be activated by:
  rpcbind.socket

• Meanwhile, rpcbind.sock is still active

# netstat -anlp | grep -i rpc
unix  2      [ ACC ]     STREAM     LISTENING     19174    1/systemd            /var/run/rpcbind.sock

• After some time, rpcbind.socket activates rpcbind.service again.

# netstat -anlp | grep -i rpc
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      48081/rpcbind
tcp6       0      0 :::111                  :::*                    LISTEN      48081/rpcbind
udp        0      0 0.0.0.0:111             0.0.0.0:*                           48081/rpcbind
udp        0      0 0.0.0.0:778             0.0.0.0:*                           48081/rpcbind
udp6       0      0 :::111                  :::*                                48081/rpcbind
udp6       0      0 :::778                  :::*                                48081/rpcbind
unix  2      [ ACC ]     STREAM     LISTENING     19174    1/systemd            /var/run/rpcbind.sock