In some rare cases events with "next scheduled time" may not trigger. Cyclic Events that run every few minutes may see their times rest to next day.
ESP dSeries / Workload Automation DE : 12.3 or above
In High Availability (HA) settings, the two DE / dSeries servers have different time zone settings. Even if the times are same, the time zone label may be different. E.g ETZ on one and UTC-5 on another server.
Make sure the timezones of both HA servers is exactly the same. Do not use different labels for same time zone.