I recently bought a new TV that has GoogleTV (Sony X90J). I have my receiver connected via eARC and that is working perfectly for all the native TV apps, except Apple TV.
Today I tried playing a movie from my purchase collection in the Apple TV app and there was significant audio sync problems. Every time I paused and played again, the sync would be off by a different amount.
To reiterate, I have not had this issue streaming from Netflix, Disney+, Prime Video, or Youtube.
I'm hoping that this is just a setting problem or something. Can anybody else share if they have had a similar experience with the Apple TV app on GoogleTV?
No issue on Nvidia Shield, also have a sound system via hdmi. Have you tried seeing how it sounds via just the tv speakers?