Just now tested, and the only sync issue (very slight, completely watchable) I found was with the Santo LIVESTREAM REPLAY host segments. The movie was also just fine; it’s dubbed, so whatever.
Also, on the Roku there is live/visual preview during fast-forward/rewind. I’m pretty sure it wasn’t there before.
Roku Ultra 4800X
Fire TV Stick 4K
LG OLED55C9PUA TV
Vizio SB36512-F6 Soundbar
NOTE: I had previously (mistakenly) posted similar in the Gizmoplex thread.