Always difficult to express latency issues without getting it mixed up with classic "please wait“ buffering problems. There's no stuttering via the Phantom Optical In, just a constant 200ms offset for movie sound. Dialog Optical has a problem with 96KHz material... that just goes cuckoo after 5 mins of listening.
JRiver v25 (Windows) >> 220Pro/CI >> PMC Twenty5.23 + twin KEF KC62 subs. One White Phantom.