Trying to create a new point feature in a AGOL feature service

I am trying to simply create a new point feature in an ArcGIS Online hosted feature service. I am using the Geometry Picker widget (Geometry Type = Point, Max Geometries = 1) - Change Event.

The Create Feature simply geometry input is =$form1.state.selectionGeom.value.geometry[0]

And the Add Features uses the URL of my test service:

https://services1.arcgis.com/9adZ............/FeatureServer/0

and Features = $Feature2.feature

This adds the feature when I try it the "Sandbox" of Geocortex WF5 - but the yellow Circle (geometry picker) doesn't go away and the form doesn't reset - and when I run the same WF in Web App Builder - it doesn't work at all - and gives me a Workflow error in developer tools, but a 200 OK Status for the apply edits. Perhaps I am doing things wrong, but don't understand what is happening. Any tips/examples would be great. Thanks