If your sitting height is about level with the middle of the TV, I cant notice it. If your TV stand is higher and you're viewing at or near the bottom, you might get a bit of obstruction as the sound bar is maybe 1.5 cm taller than the bottom bezel of the 854.So it doesn't block it at all as far as I can see?.
And the 854 is pretty close to edge to edge. But no it shouldn't be a problem.
The Samsung bars are taller than the LG by quite a bit, so you'd have obstruction with something like a HW-Q80R.