Yes, as my teammate Mofis mentioned, when you speedhack with high speed, you probably desync a bit, and your "real" location may be somewhere else than where you think you are. This happens with all speedhacks, and only way to prevent this is taking a few normal walking steps and interacting with world (opening doors etc.) to force server update your position.
You can expect this happen since you already desync without any hacks becaue of shitty Arma engine.
Could we now keep discussion on topic? :)
Teme