Hello am just doing what i can to make you aware of this major bug in UE 4.4 - 4.5 (4.6 not tested).
And its related to physic replication for skeletal and Static meshe`s.
A full description can be found here, I realy hope this gets resolved asap.
At its truly a game breaker, and it is drawing our development to a halt.
As we can not continue when we have a lot of stuff relient on physics for our game and we can not test it.