I constantly experience this problem in PvP.
The problem: I am blocked and unable to move forward, even though there is no obstacle in front of me. In 1 second (plus/minus 300 ms) there comes (!) another knight and puts his bomb there. Often this happens when they're moving:
a) behind me
b) slower than me
c) a+b at the same time

Basically, my movement data is up-to-date, but my visual data is completely wrong. I see the bomb after I am blocked by it. Even though in my game there wasn't any bomb in front of me.

To fix this visuals need to be updated together with movement and damage info:
a) I see no bomb = there is no bomb
b) the bomb is there = I see it there
There shouldn't be any difference in time between "I can see it" and "I can't move past it".