I've had Mojo 2 for a few weeks and all is going well. Prior to receiving the Mojo 2, my Mojo 1's USB socket was inoperable and when stationary, I used the optical port via Chromecast Audio and that work as an interim solution. Upon receiving the Mojo 2, I bolted on the Poly for music listening, and retired the Mojo 1.
The other night, I disconnected the Poly with the goal of watching
Miles Davis: Birth of the Cool on my Mac with the audio going from the Mac wirelessly to Chromecast Audio and then to the Mojo 2 via the optical port and outputted to my Focal Clear headphones. What I heard throughout the film was (very fine but with) a delay in the audio. It was tolerable since most of the film was music, or narration on top the music/original footage and less so narration with the camera on the speaker. I then tried to do the same by eliminating Chromecast Audio. This time, my connection was from the Mac to the Mojo 2 using the USB-C input and then to my headphones. No delays!
Any speculation why there would be a delay when Chromecast Audio was part of the chain and not when I eliminated it?