It doesn’t, there is some camera jittering that happens natively with TAA/TSR but it shouldn’t happen if you aren’t using those. Aliasing in general however is ubiquitous in all games and engines, particularly for foliage. But then I also have no idea what it is you’re seeing so for all I know you could be describing something completely different from what I’m imagining.
Post screenshots or a video if you want a more specific answer.