Something funky...
I am getting data from REST API and I have an object with another object inside.
On view canvas I can access it no problem with DataItem.object.property
I want to update the Record in Rest and when during the value assigment I use the type "Data" in selection - I get error. When I use formula and access exactly the same property inside the object - it all works fine...
I hope my attachment will provide more clarification.
This is quite strange as these should be equivalent. I have not encountered it DataItem.property but only in case of DataItem.object.property
UPDATE:
This also seems to affect current.myObject.myField bindings – formulas work, direct binding doesn't.