When shooting at ranges longer than ca. 630 meters spotter is unable to tell how much the sniper has missed, since no bullethole or particle effect is being rendered for him.

Person who is shooting can see both effects clearly, other players cannot. Screenshot provided, from shooters perspective. Line above which the shots didn't render for the spotter is marked in orange.

Issue is present since last server update and I suppose it has something to do with netcode optimizations/LODs.
I remember being able to see bullethit effects on even longer ranges before. Now it's impossible; spotter cannot see dust effects, blood mist or "meat particle" effects after sniper hits his victim above certain range.

This bug renders sniper/spotter pairs useless, as the spotter is unable to tell the sniper how to correct his firing solutions. {F26191}