Solved: Buffering on a particular stream
I'm using TB. I was watching a show and an episode started buffering every few seconds on Nuvio. Seeking it to somewhere before 15:00 gave smooth playback, but anywhere after 20:00 was buffering for sure. I tried downloading it from my dashboard but the speed was great when downloading. Playing it over webdav in VidHub also showed no buffering. Another stream of the same episode which was bigger in size, both HEVC mkv, did not buffer for some reason on Nuvio. I tried changing many cache/network settings and in the end only this worked:
Exo-player Native Memory : ON
Custom playback buffers: OFF
VOD Disk Cache: ON, auto size
HTTP/2: ON
Parallel Connections: ON
Connection Count: 2
Chunk Size: 4 MB
The chunk size setting is probably the most important coz it was the last thing I changed when it worked. Zero buffering on the same file now. Posting here so someone else facing similar issue might try these in Nuvio.