hello,
I had the same issue and I found the answer.
My problem: I had run a task from scheduler, with 2 machines working on the same process, but the first one has been stopped due to an error. I'd expect that the second machine would still work on the process, but it got stopped. The error stated that the machine got stopped from ""Application"" resource.
The fix for that issue, was unticking the ""fail fast on any errors"" tickbbox in that one task in schedule.
Br
Andrzej