Hello,
I have an issue in scheduler when I drag and drop tasks. It disappears, but actually it changes start and end time of the task to wrong values (not the ones I have chosen).
In the attached gif you could see whole process how this issue comes up:
I have found out that it disappears because task start and end time are out of working (8-16) hours.
Here is properties of this task:
Have you ever faced similar issue before?