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When a position is forced, the actor position in physics subsystem is overriden. The background physics thread is not made aware of this, its result are simply discarded. There is a short window where this doesn't work (in this example, actor is at A and script moves it to B) 1) actor position is set to B. (among others, Actor::mPosition is set to B) 2) physics thread reset Actor::mPosition with stale value (around A) 3) main thread read simulation result, reset Actor::mSkipSimulation flag => actor is at B 4) physics thread fetch latest Actor::mPosition value, which is around A 5) main thread read simulation result, actor is around A To avoid this situation, do not perform 2) until after 3) occurs. This way, at 4) starts the simulation with up-to-date Actor::mPosition