get rid of flickering


I’m new to Unreal.
here I have a sample scene ( automotive material , provided bye Epic), a simple cine camera and simple DOF animation in sequencer.
as you can see I suffer from huge flickering in ( screen space reflection). in fact most of it comes from blurry glossiness or reflection.
please let me know how I can eliminate this artifact. It gets worse at distance… no matter what I do.

Ps: seems like I can’t upload .mp4 here. I just uploaded a screen shot. here is the file…9#.WcUhBIxL9hE

thank you in advance

Please help me fix this problem, cause I need it for a quick project.
thank you