CarPlay - getting Progress Indicator on Image Row Condensed Element?

In our CarPlay implementation, I've been trying to get the progress indicator to appear on an image row item using the condensed element style.

Is this possible? I have been able get spinners to appear on regular list items, but not on image row condensed elements.

Trying to figure out what this means from the docs for listImageRowHandler:

"CarPlay displays an asynchronous progress indicator until you call the completion closure."

https://developer.apple.com/documentation/carplay/cplistimagerowitem/listimagerowhandler

Here is a snippet of my code for the handler:

        let elements = myShortcuts.enumerated().map { index, shortcut in
            let element = CPListImageRowItemCondensedElement(
                // code here...
            )
            return element
        }

        let row = CPListImageRowItem(text: nil, condensedElements: elements, allowsMultipleLines: true)
        row.listImageRowHandler = { [weak self] _, index, completion in
            self?.operate(at: index) {
                completion()
            }
        }