Pro.deploy.extract stops at 94%

I have just implement the new Ionic Pro deploy functionality.

On iOS it works as expected. On android it fails in production and debug. I have tried it on 2 different android devices.

Here is my code:
try {
const haveUpdate = await Pro.deploy.check();

if (haveUpdate){
downloadProgress = ‘Downloading…’;
console.log(‘downloading’);

await Pro.deploy.download((progress) => {
  downloadProgress = `Downloading: ${progress}%`;
});
console.log('downloaded');
await Pro.deploy.extract((progress) => {
  downloadProgress = `Extracting: ${progress}%`;
  console.log(progress);
});
console.log('extracted');
downloadProgress = `Redirecting - please wait`;
await Pro.deploy.redirect();

}
} catch (err) {
downloadProgress = We have encountered an error. Please restart this app and try again.
// We encountered an error.
// Here’s how we would log it to Ionic Pro Monitoring while also catching:

// Pro.monitoring.exception(err);
}
in the Pro.deploy.extract method, progress hangs at 94%.

Strangely, the console.log call that outputs ‘extracted’ is logged between the output from 74 and 75% extracted.

await Pro.deploy.redirect() is never called.

It also fails without the console log statements.

cli packages: (/usr/local/lib/node_modules)

@ionic/cli-utils  : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : 7.1.0 

local packages:

@ionic/app-scripts : 3.1.8
Cordova Platforms  : android 6.3.0 browser 5.0.3 ios 4.5.4
Ionic Framework    : ionic-angular 3.9.2

System:

Android SDK Tools : 26.0.2
ios-deploy        : 1.9.2 
ios-sim           : 6.0.0 
Node              : v8.9.1
npm               : 5.5.1 
OS                : macOS Sierra
Xcode             : Xcode 9.2 Build version 9C40b 

Environment Variables:

ANDROID_HOME : /Users/chrisdelambert/Library/Android/sdk

Misc:

backend : pro