Try turning off the motion blur effect in General > Graphics.
Looks like TAA ghosting to me but hard to tell from a still image. What are your antialiasing settings and are you on SU9 or SU10 Beta?
Can you try another antialiasing option and see if the issue persists? Each antialiasing type is going to have upsides and downsides but you might prefer the look of FXAA or DLAA. DLSS is just around the corner in SU10 as well.
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