When I canceled the download by downloadItem.cancel():
Firstly, onCancel triggered.
Secondly, onProgress triggered with progress 0 and progress on dock icon is almost completed.

Reproduction

1. Download and pass some callbacks like this:

    onStarted(item) {
      item.on('updated', (event, state) => {
        if (state === 'interrupted') {
          item.cancel();
        }
      });
    },
    onProgress({ percent, transferredBytes, totalBytes }) {
      console.log('progress', percent)
    },
    onCancel(item) {
      console.log('canceled', item);
    }

2. Wait a moment and turn off WiFi.

Expected Behavior

After onCancel, no onProgress triggered and the dock icon progress should be hidden.