Yeah, it would be great to get some feedback either here over via the tickets we opened.
To the devs, this is what I have found in my constant troubleshooting:
If I restart the Apple TV though the settings > system menu, the issue goes away for several days (or after playing several movies)… then the random long-buffering starts again. Then I restart the Apple TV and the problem vanishes (for a while anyway).
I am not sure what exactly the Apple TV does during a restart process and how that impacts Infuse - Flushes a cache? Resets it’s connection to the network? - but whatever it does, it resolves the problem for a short time.
I am half tempted to totally reset my ATV4 to factory and rebuild it. It would be a pain reloading all the apps, but it would satisfy my curiosity to see if it addresses the problem for good.