I’m going to give it a go.... seems right to me as I noticed Just Before commercial breaks.. all is fine, then after it’s all messed up. I did find going out and either physically resetting my internet router or even through the Roku (sometimes) reco figuring WiFi.... it straightened up... like the picture or them audio gets ahead of the other.... hoping this works!!!! PLEASE... or it’s going back!
I've had my roku express+ for a while..I never had any kind of problem until a couple of months ago...then I started having audio lag problems too. Tried all the suggestions, they're just a temporary fix. I've suspected for a while this has something to do with an update because it started overnight!
The Commercial break problem is exactly what I had before with CNN on Sling. It always came back after I re-synced it by exit program and go back on the next top of hour or bottom hour commercial break. Seemed certain Commercials were more likely to cause the problem. The other way I re-sync is pause/leave playback and go back from my Tablo when I had sync issues with it. (Sling and Tablo both play through the Roku).
As I understand the issue, the processing for streaming video is more complex then the processing for audio, so it the video has any hick up, the 2 get out of sync. Many newer TV's have setting for Sync delay, but that assumes the sync delay is a constant, but this kind of problem isn't constant.
In order for Roku to fix it, would be to automatically re-sync if there is any problem with the video. I see the red/Orange circle when there is a problem with the video, so the software needs to stop both video/audio streams and re-start both when that happens.