Aim IK jitter in first person view

Hello. I'm making a multiplayer FPS game. In my game im using animation rigging. But my problem is when im looking up and down my hands jittering. How can i fix this?

Or my camera shows it that way. Where i need to update my camera? In update or lateupdate or fixedupdate?

Sorry for my english.

Im running into some similar issues. Have you found a solution?

same here tried everything like changing animator update method to animate physics why unity always stop updating packages when they were promoting it heavily?

Hello, did you solve it?