Apple TV 4th Gen and Internet Connection/Router Issues

[PCFan]

I have a 4th Gen Apple TV 32GB and my internet connection is sometimes disconnects on me or my router sometimes stops working or maybe both, I think it's an issue with my router though. Now I noticed that even though I have most of the movie cached in the Apple TV's internal storage, if my internet disconnects or my router stops working momentarily, my Apple TV plays from the cache, but only for about 5 minutes and then the movie stops playing and I get a message saying that the iTunes store is unavailable, even though there is like 1 hour of cached movie in the storage based on the progress bar. Is this normal behavior for the Apple TV to only give you like 5 minutes grace period for internet disconnections even though the most of the movie is already cached in the Apple TV? Also I have a similar issue with streaming locally from my PC to my Apple TV with home sharing. If my router stops working even for a few seconds, the movie will stop playing, even though a huge portion of the movie is cached ahead in the Apple TV's storage. Then I get a message telling me to enable home sharing. Shouldn't the Apple TV play what is cached ahead and only quit playback when it reaches the end of what was cached on the event of an internet or router disconnection or is it what I'm experience just the way the Apple TV operates?