Ok, so your TV doesn't have very good input lag. In game mode in 4K or 4K HDR the input lag is 54ms. That's getting to the point of very noticeable. That's what your issue is.
Your TV also doesn't do HDR very well. The best thing you can do is keep HDR off in the game and play at 1080p This is the "Faster" setting. Balanced being 1440p and Sharper being 4K.
If you play on faster, your input lag will be 34ms. Which is a bit high, but much better than the 54ms you are getting when trying to use HDR and 4K.
Hope this helps.