Are you sure the the workflow is not running?.. the fact there there is a comma in the list to run on field suggests to me that there are, in fact, two Users in the list.
I thought this too, but yet the action is not happening that I’d expect. I’ll double check as this makes sense but I’m not sure why the action then isn’t running.
Final update - this was a confusing one but essentially it was a combo of incorrect APIs and typos that caused this - unfortunately this was all hidden by my confusion at the empty but unempty list lol.