Just wanted to share with folks a defect i submitted this AM that covered 2016.3 and 2017.1
If you attempt to add the map drive action to a condition, you receive the following error.
You can drag the action out of the condition and it will work, but i was able to confirm with LD that this IS a defect. The defect ID is 42888.
The current workaround is to either put the map drive action outside of your condition, or use the map to preferred server action instead inside the condition.