Dell Boomi observed a known issue following the June release. Some users who had web service server (wss) listener(s) deployed to a local atom, molecule or cloud observed that they were not running following application of the release. Other types of listeners (e.g. JMS, AS2) were not impacted.
If you experience this issue, the temporary solution is to restart your local atom, molecule or cloud. Restarting the atom, molecule or cloud again should restart the Web Services Server and your listeners will become available again.
The Dell Boomi team is currently investigating this issue further. We have logged an internal backlog item to prevent this issue from happening in a future release: The issue ID is BOOMI-5425.