Set query params with dynamic values in callback URL // AWS Cognito // STATE

Question

My URL has some query params with dynamic values. I am trying to use the STATE parameter. Following is how my url looks like:

https://test.amazoncognito.com/oauth2/authorize?redirect_uri=https://test.com/&client_id=123456789&response_type=code&state=cache=123456789&u8=1&page_number=123456789_0&AjaxEnabled=component&action=Test&wizardActionMethod=execute&actionName=Test&portlet=poppedup

When I hit this URL, I get the code and state back in query params. But the state parameter has only the first query param.

?code=rfdsfkjlk123213sfdff&state=cache%3D123456789