Extreme stuttering from mouse movement

Replying to bring light to this issue.
I also have this problem, the exact same issue as you except at 1000hz polling rate. I get mouse stutters along with the game freezing and frame rate will drop significantly just like what you showcased in the video except mine happens at 1000hz polling rate. The band-aid fix I have for myself at the moment is to lower it to 500hz (which feels awful). Ever since the hyperion anti cheat update(7/28/2022) my game will stutter randomly and freeze up for a split second frequently throughout a single match. "Periodic stuttering with no user input" the same exact thing you also said. I think we are experiencing the same exact issue expect yours happens at 8000hz and 4000hz.

We both have different computer specs and windowOS versions. My mouse model is a wireless g303 as well.

Product: Apex Legends
Platform:PC
Please specify your platform model. PC/origin client
AMD or Nvidia Model Number rtx 2060
Enter RAM memory size in GB 16GB
Are you using any software with an overlay? No
Where did the issue occur? In a match/at the ready up menu
Which part of the map or menu were you in? If you don't remember the exact name, please describe the area or what you were trying to do in the menu. Anywhere
What were you doing when the issue occurred? E.g. respawning a squad mate at a beacon, using an ability, a squad mate left the game. Nothing
Did your squad mates also experience the issue? Yes
How many matches had you played in a row before the issue occurred? 0
When did this happen? (dd.mm.yy hh:mm) 28/7/2022 (the update that introduced hyperion)
How often does the bug occur? Every time (100%)
How severe is your issue? Major impacts to gameplay
What happens when the bug occurs? Periodic stuttering with no user input; also massive stuttering/performance drop while moving mouse
What should be happening instead? No stuttering
Steps: How can we find the bug ourselves? Try any Windows version before 1809. This happens to me on windows 7 as well.

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