That the flow still executes is expected, the execution takes place outside SAS metadata. SMC (should) show what is scheduled.
Does the DI job and the Scheduled job still exists in metadata?
You can also check metadata dependencies (between flow and deployed jobs) through the metadata browser from a DMS SAS session, or third party tools.
Maybe a stretch, but you are using the same credentials now as when you defined/deployed the flow? And the authorization hasn't changed.
Have you checked your local SMC log as well?
Data never sleeps