Wait node on form submitted using an expression to display dropdown

Help me Build my Workflow
1

my input is as follows

[
{
“dropdown_options_config”: [
{
“id”: “xsmall”,
“name”: “extra small”
},
{
“id”: “small”,
“name”: “small”
},
{
“id”: “medium”,
“name”: “medium”
},
{
“id”: “large”,
“name”: “large”
},
{
“id”: “full”,
“name”: “full build”
}
]
}
]

when i feed this into my wait node

resume: on form submitted

auth: none

form elements:

field Name: pick_size

element type: dropdown

field options:

option (expression): {{ $json.dropdown_options_config }} 

when i execute step the wait node i get a one field input screen (as expected) with the correct prompt.  this input field is a dropdown, but it only contains one line "[object Object],[object Object],[object Object],[object Object],[object Object]

i assume there are 5 [object Object] due to there being 5 entries in the array. 

i would like to have 5 choices displayed in the drop down as described in the input json shown above.

any help is greatly appreciated!!!
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