we have multiple customers reporting that Fling is not working with Android and the latest 4K FTV Stick.
It seems that the sticks don't show up as remote devices on the Android phones/tablets. (No specific Android version, it seems to happen with at least Android 6,7,8)
So far I couldn't get one in my hands to reproduce the issue. Was the Fling SDK tested properly with the 4K Sticks?
There was a similar issue when the 3rd generation was released, after a fix in the SDK it was working properly there. (reference here: https://forums.developer.amazon.com/questions/95401/fling-sdk-support-for-fire-tv-stick-3rd-gen.html)
Could this be something similar again?
As soon as I have a 4K Stick here I can try to test on my own, unfortunately I can't provide any more specific information right now.