Maybe you unlucky and your cable is faulty, I check the comment, only one person give 1 star and using RTX3080, I guess that person is you. Haha!
Total 39 users feedback, 37 give 5 star, 1 give 4 star, 1 give 1 star. Majority is 99% satisfied.
I got total 3 units of this brand HDMI cable, all purchase at Harvey Norman and all work without issue to me.
2 of them I already use nearly a year. So far so good. Touch wood.

1) Connect my LG SoundBar SK9Y to LG C9 TV.
2) Connect my Apple TV 4K to LG SoundBar SK9Y running Full RGB.
3) Connect my PC RTX 3080 to LG C9 TV running 4K HDR 12bit 120hz.
I play since I setup until now, no single signal lost and no blackout.So far I never face any video signal lost issue when playback video up to 4K UHD HDR REMUX <<-- Direct playback by Apple TV 4K in exact quality without transcode.
I also never face sound signal lost issue where up to Dolby TrueHD and Dolby Atmos.
The most recent is today gaming up to 4K HDR 12bit 120hz and no issue as well.
I completed setup around 11 AM yesterday until now 12 AM didn't turn off the TV and PC yet. So far so good.
That could be the case but you have to understand all the reviews are based on usage for 4k 60hz 18gbps prior to availability of hdmi 2.1 source, and for that purpose, verified working. But for hdmi 2.1 48gbps which the cable is intended to is limited user verified. I even checked with he seller and they couldn't confirm working. Anyway, good it's working on your end 👍