Create Task Form Data Grid does not populate values from data table passed as an argument

I have created a data table with one column of type string and populated it with 4 records from an array of strings.

when I pass the data table as an argument into the Create Form Task activity, I have followed the steps of adding a data grid to the form and ensuring my field key matches to my data table

When I view the form in action centre I can see that 4 records have been created but they are all blank, there should be string values from my array?

Has anyone come across this issue before or is it a bug?

Thanks

@david.mcerlain

Also your column name should be matched exactly with the data grid column field keys

Cheers