A bug in the routine calculating the next period turnaround of Schedule Objects causes multiple or no executions of jobs after the day light saving switch.
The bug has been introduced in the following service packs per release:
Automation.Engine 11.2.9 and 11.2.10 Automation.Engine 12.0.6 and 12.0.7 Automation.Engine 12.1.3 and 12.1.4 Automation.Engine 12.2.1 and 12.2.2
Systems running on an earlier service pack of the same release are *NOT* affected. e.g.: AE 12.0.3 = not affected; AE 11.2.9 = affected
Any JSCH object in any system, independent from the system's local time zone can be affected. A Schedule Object is affected in case it has a time zone object defined which refers to a time zone in which a daylight saving switch is defined. Schedules with no time zone defined will fall back to the client's time zone. Hence, all Schedules within a client which is set to such a time zone are affected.
Daylight saving switches occur on several dates from early March to mid April depending on the country. The country the system is physically located doesn't affect the vulnerability. It's the setup of the TZ Object in Automic Automation.Engine only, which determines if the bug will occur or not.
An overview of countries withDSTswitch and when they are due can be found here: