Sorry, I should have asked also:
Connected via ARC or SPDIF, and to what type of AVR?
And is the audio preceding the video or vice-versa?
Have the same issue with DTS audio playing ahead of the video.
Model: 4640X - Roku Ultra
Firmware: 8.0.1 build 4042-29
Receiver: Onkyo TX-SR504 (via optical)
Audio is streamed in DTS and decoded in receiver. Roku is connected to the receiver via optical, and to the projector via HDMI.