Hi just found this on the Netflix site
"Android Error 11003
If you experience the Android Error 11003 immediately or intermittently after opening the Netflix app on your Android device, this is typically due to a system setting preventing the Netflix app from functioning. Follow the steps below to resolve.
Confirm the System Settings on your Android device.
Navigate to Settings.
Under System, choose Developer options.
Under Apps, uncheck Do not keep activities.
Re-enter the Netflix application and try playing again."
I will try it and report back in case anyone else experiences these issues in the future