Physics-Based Reaction and Trace

When blend weight is 0 it looks no simulation but collision is completely in simulation until disabling physics.
So When I shot enemy’s head with a full auto rifle ,
first shot activate Physics-Based Reaction then second shot trace through his head.
To avoid this , I must duplicate skeletal mesh for stable trace.
But setting master pose disable collision, so I must open anim blueprint and use Copy pose form mesh node.

なんでこんな仕様なの。