Some claim it's fixed with another HDMI cable, some other ideas at https://www.cnet.com/forums/discussions/lg-oled-tv-lg-soundbar-out-of-audio-sync/
HDMI cables are HDMI and network cables are network cables. Tell more.
I have a LG OLED65B7A and I'm running HDMI ARC to a Denon X4400h and when I watch Netflix or Amazon Prime through the TV apps the sound will drop out for a second every few minutes. I'm running the network cable directly to the TV and my network speed is 293 Mbps so O don't believe it's a buffering issue. I would appreciate any help correct this issue.

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