Hi @Anonymous User
So what playback devices have you tested the Amazon Prime App on for example ?
What down speed are you seeing and wifi reception are you seeing at these playback devices.
If the speed and wifi coverage is above average i would be tempted to try something like Google Public DNS on your playback devices if they can support this (search on the internet on how to do it).
Some tips from this internet article might be worth trying if you are not encountering poor wifi speeds and poor wifi signal reception at your streaming devices.
https://www.getdroidtips.com/prime-video-buffering-too-much/
