Ansible tasks failed with unreachable error randomly

Issue

• Ansible tasks sometimes failed with any of the following errors

UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: Could not resolve hostname example.host.com: Name or service not known", "unreachable": true}
msg: ''

UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: connect to host example.host.com port 22: Connection timed out", "unreachable": true}

UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ssh: connect to host example.host.com port 22: Connection refused", "unreachable": true}