Can't connect to EW-WU111 after upgrade to iOS 11 – E-TUBE PROJECT Cyclist Review

The app used to work fine until the release of iOS 11 recently. Now I can't connect via Bluetooth to EW-WU111 to update firmware of Di2 components, I get the error "BLE connection was interrupted, try again". I have the latest version of the app as of this moment (v3.3.0) and am on iOS 11.0 on iPhone 6. Lucky me I had another phone still on iOS 10 which I was able to use successfully to connect and update all Di2 components, including EW-WU111. Even after the update, I wasn't able to connect from the iOS 11 phone.
Review by CactusChip on E-TUBE PROJECT Cyclist.