Infinite flight #2 PC performance native 4k

Yesterday I have played halo infinites flight #2 for the first time.on pc. I always play my games in native 4k at around +/-100fps but the performance of halo infinite is not good. I’ve got around 50-70fps stutters in game in full screen. Had to turn down the resolution to 1440p and playe it in windowed mode to get a good performance out of it.does anyone have the same issues?

My Sytsem: ryzen 9 5900x
Msi rtx 3080 gaming x trio
32gb DDR 4 ram @3200mhz
5 TB ssd storage (3 ssd’s and 3 nvme m2 ssd’s)