Thank you MotoX80,
The results are conclusive.
Since the March 2023 DST change, scheduled tasks that are due to start between midnight and 2am no longer able to start. The test tasks are performed using a weekly schedule.
In the Event Viewer - Microsoft-Windows-TaskScheduler/Operational eventlog shows the created task process for the 23:55 task and the next test file copy task to started at 02:00
In the history of the tasks that did not run only shows one entry which is Task registered.
The tasks that did run show Task Triggered on Schedule, Created Task Process, Task Started, Action Started, Action Completed and Task Completed.
My suggested to all, is to adjust the schedule of the task to be before midnight or after 2am until Microsoft fixes this issue.
Kind Regards
Paul H~