Since English is my second language and I like to watch the movies/TV shows in English I find myself jumping backward somehow frequently when I do not understand well something. The process is far from fluid because, depending on the video format (more than on the bitrate, apparently, since skipping in some 4K movies I have is nearly acceptable) it can take up to 2 seconds of buffering each time. On top of that, after the video starts again the audio may arrive another 1-1.5 seconds later. Which can become quite tedious.
Both my NAS and ATV4K are wired and connected through an 1Gbps Ethernet switch (measure transfer speed up to 950Mbps). The issue has always been present no matter if I used the webDAV or SMB (any version) protocols. I also tried with the Plex shares (with the Plex server being my MacBook Pro wired to the same switch) and more or less I had the same result. Interesting enough, using the Plex client in the ATV 4K (and thus the connection is NAS ← SMB → MBP ← Plex transport protocol → ATV 4K) the skipping is much faster, often immediate. Apps like Amazon Prime Video and Netflix work just fine. Kodi is much faster as well.
To make things worse even the media players I tested in my Bravia with the S-L-O-W Android TV and a 100Mbps ethernet connection don’t suffer this issue (they do suffer many other problems, which is why I bought the ATV 4K with Infuse, just not this one). Is there any chance someone can focus on fixing this issue? At least having the audio starting with the video would do! That delay is the most annoying. Thanks.