We are on an extended trip where we have been casting Hulu Live to various TVs. We have observed that once casting is initiated, that the router essentially bypasses the Android tablet. For example, casting continues even after the tablet is shutdown.

We have noticed that if Hulu is active on the Android, that there are buffering issues. Shutting down Hulu on the Android devices has resolved that problem. No buffering on the tv receiving the casting.

With Hulu active on the Android device, while casting; we noticed that the casting would lockup while using another application. With Hulu disabled, casting lockups did not occur when using another application.

The takeaway is that once casting is initiated, shutdown Hulu on the Android device. Of course if you need to change "channels" you will need to temporarily activate Hulu.