BlackScreen when excute bot as unattended.

Hi,

The task includes 3 parts. if I use trigger to trigger the second part after the first part finished,then black screen will appear on second task.

But if I put the second task into main task as a Sub task, then the black screen will not appear.

for some reason, I have to use the trigger to trigger the second part, so i can rerun the second part as needed. How to solve this black screen issue?

BTW, we have group policy that maximum time of each session is 2 hours which is unable to changed.

Thanks,

Joe