Oh, my mistake. Wrong stream.
renojim is right that it's the same 6 segments over and over. So it seems to me that it's playing exactly what the manifest is telling it to. If the idea is that the content of those segments is changing periodically, that could be a caching issue. It could also be that the encoder isn't updating them before the player makes the next request. I don't know for sure if repeating segment URIs is a violation of the HLS spec, but it's definitely unusual. And the timing of a scheme like that seems dangerous. Best practice would be for each segment to have a unique URI.