1. There is no fix provided at the moment for breaking the cyclic events, the only workaround is to refresh the event.
2. This issue occurs if the schedule criteria is frequent enough to exceed the number of computed runs the DE Server can evaluate during the exception period.
In CA Workload Automation DE r11.1, the limit of computed run evaluations is 156.
In CA Workload Automation DE r11.3 or 12.0 or higher, the limit of computed run evaluations is 300.