Can you please attach an editor mission with the right spot or provide coordinates where you found this? Does it also apply to stand-alone trees or only this constellation?

To set player in same location as screenshot, on Altis execute:

player setPos [7363.44,17029.2,0.0017395]; player setDir 13.1386;

then go prone.

Whatever the geometry the Laser designator target gets cast on does seem to be some fairly inaccurate for this particular tree. It's not specfic to the location, but the tree.
I could not reproduce any bullets getting deflected or impacting with the same geometry.

I put an editor mission, You just have to aim the same place as the screenshot and open fire, you'll see the impact as in a tree.
If yo want to see the real outline of the tree, just use your laser designator...

The truck is your target: zeroing to 800m a few bullets and it blow up.

So lie down shoot the truck, make a few step right and try again.

I just had the problem again, with the same kind of tree, but another location.