Not sure if it is intended to work this way but when Window size=0 for a step deployment gets stuck.
I would rather expect same behavior as for empty value - run a step in parallel for all targets.
Thanks for getting in touch.
We had not considered setting a window size of zero. I don’t think setting it to zero makes any sense (it will run on no machines at once) so we would be better served by validation that does not allow that setting.
Thanks for bringing it to our attention.