@dario.casubolo and @fahuet, I may have inadvertently stumbled upon a solution. I’m in the habit of deleting unnecessary containers to declutter my workflows. Since it makes the most sense to have a single activity in the “Do” scope of the Download File activity, I deleted the “Do” sequence and dropped my click activity into the Download File container.
However, on a hunch, I brought in a new Download File and dropped the same click activity inside of the existing Do sequence. And it worked!
I tried deleting and recreating the Do sequence a few times to make sure that I could reproduce the error, and I could. Maybe this fix will work for you two as well.