Since the update that created hdcp errors. The sound is no longer in sync when playing Vudu movies. The voices are usually 1 second behind or more. You can goto a chapter or restart movie, 90pct of the time it is off. If you rewind a frame or 2 and repeat eventually you will get lucky to sync the sound. One can waste 30 minutes dealing with this issue. Have not seen same problem with 4k streaming stick.
4660x- Roku Ultra
9.2.0 build 4807-46
Error on Vudu is like 3 to 5 builds ago that created the issue