API Action URL Parameter Value Not Substituted

Can’t seem to get the API action to substitute the value of a repeat’s data into the URL using a put call. I’m following the documentation here: API Connector components, how to use and connect REST/Curl API's

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Here’s a test URL:

Here’s the app structure. It’s Framework7 with a repeat on the row above the API Action:

The ID (3evAuRShSJemTW777MxE) is rendering correctly in the repeat region as seen here:

Chrome Dev Tools shows the following:

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