Red dot artifact : Not game braking, but weird anyway

Hello devs ! You probably already know that, but hey. Just in case...
When using the red dot, I see two small points of light above and below the actual dot. Don't know what's causing it, but here's a screenshot (taken with Steam, so the quality isn't that great) :

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And while you're at it, zero the damn thing.

Just upping the topic, since it was not fixed with latest patch.