Building an adaptive card and trying to use "only show when" logic but it doesn't work

[Jo-Ellis]

I'm making an adaptive card for Copilot studio to create a small form the user must complete at the start of the conversation.
I am trying to build two different choice input's that will be hidden initially and only be shown based on a choice.
The choice is to show option 1 if the user chooses "Create a new user" and show option 2 if they select anything other than "Create a new user".

Below is the JSON of the full adaptive card. It is displaying both options regardless of what choice is made.

{
"type": "AdaptiveCard",
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.3",
"body": [
{
"type": "TextBlock",
"text": "Hi, I'm Alice your Virtual Assistant.\n\nPlease answer the below questions so I can help you with your query.",
"wrap": true,
"id": "text",
"fontType": "Default",
"size": "Medium",
"weight": "Bolder"
},
{
"type": "TextBlock",
"text": "If you are making a request for someone else or requesting a new account, use their details when filling in the form not your own.",
"wrap": true,
"id": "text2"
},
{
"type": "Input.ChoiceSet",
"choices": [
{
"title": "Myself",
"value": "Myself"
},
{
"title": "Someone else",
"value": "Someone else"
}
],
"placeholder": "Placeholder text",
"id": "requester",
"label": "Who are you raising the request for?",
"style": "expanded",
"isRequired": true,
"errorMessage": "This information is required for your request."
},
{
"type": "Input.Text",
"placeholder": "[email protected]",
"id": "email",
"label": "Please enter the email address associated with the account:",
"isRequired": true,
"errorMessage": "This information is required for your request."
},
{
"type": "Input.ChoiceSet",
"choices": [
{
"title": "Password reset",
"value": "Password reset"
},
{
"title": "Reactivate account",
"value": "Reactivate account"
},
{
"title": "Create a new user",
"value": "Create a new user"
},
{
"title": "Course reset",
"value": "Course reset"
},
{
"title": "Can't attend or need to reschedule a session",
"value": "Can't attend or need to reschedule a session"
},
{
"title": "Change account details",
"value": "Change account details"
},
{
"title": "I've completed my training, what now?",
"value": "I've completed my training, what now?"
},
{
"title": "My training is due to expire",
"value": "My training is due to expire"
},
{
"title": "My course is not showing that I attended",
"value": "My course is not showing that I attended"
},
{
"title": "I haven't received my certificate",
"value": "I haven't received my certificate"
},
{
"title": "The name on my certificate is wrong",
"value": "The name on my certificate is wrong"
},
{
"title": "I need help with Oliver McGowan Mandatory Training",
"value": "I need help with Oliver McGowan Mandatory Training"
},
{
"title": "I'm having trouble progressing to the assessment",
"value": "I'm having trouble progressing to the assessment"
},
{
"title": "Other",
"value": "Other"
}
],
"placeholder": "Please select from the dropdown",
"label": "What do you need help with today?",
"isRequired": true,
"errorMessage": "This information is required for your request.",
"id": "request_type"
},
{
"type": "Input.ChoiceSet",
"choices": [
{
"title": "Standard (Learner account)",
"value": "Learner"
},
{
"title": "Admin",
"value": "Admin"
}
],
"placeholder": "Placeholder text",
"id": "account",
"label": "What type of account do you have?",
"style": "expanded",
"isRequired": true,
"errorMessage": "This information is required for your request."
},
{
"type": "Input.ChoiceSet",
"choices": [
{
"title": "1",
"value": "1"
},
{
"title": "2",
"value": "2"
}
],
"placeholder": "Please select from the dropdown",
"id": "branch",
"label": "Who does the account holder work for?",
"isRequired": true,
"errorMessage": "This information is required for your request.",

},
{
"type": "Input.ChoiceSet",
"choices": [
{
"title": "1",
"value": "1"
},
{
"title": "1",
"value": "1"
}
],
"placeholder": "Please select from the dropdown",
"$when":"${request_type == 'Create a new user'}",
"id": "newuser_branch",
"label": "Please choose the brand for the new account:",
"isRequired": true,
"errorMessage": "This information is required for your request. "
},
{
"type": "ActionSet",
"id": "action",
"actions": [
{
"type": "Action.Submit",
"title": "Submit",
"id": "submit",
"style": "positive"
}
]
}
]
}