HTTP Server Will Not Receive Data When Application ID is in URL & x-www-urlencoded

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I have a demo pipeline configured to receive 'Text' data and the application ID in the URL. When the application ID is in the header, this works no problem.

Working curl test:

curl -k 'http://localhost:8000/?sdcApplicationId=asdf' \
    -H 'Content-type: asdfasdf' \
    -d 'one_text=value_one&two_text=value_two'

Curl test that does not work:

curl -k 'http://localhost:8000/?sdcApplicationId=asdf' \
    -H 'Content-type: application/x-www-form-urlencoded' \
    -d 'one_text=value_one&two_text=value_two'

Specifically, I see the record count incrementing up on the HTTP server input, but the counter is not incrementing on the next stage. When I change the Content-type: to anything except application/x-www-form-urlencoded, it works.

Am I missing something obvious here?