Bullet rigidbody's inertia tensor does not depend on position, so no need to recalculate it if rigidbody position only is forced to a new value.

Source/Engine/Physics/RigidBody.cpp

@@ -238,7 +238,6 @@ void RigidBody::SetPosition(Vector3 position)
         btTransform interpTrans = body_->getInterpolationWorldTransform();
         interpTrans.setOrigin(worldTrans.getOrigin());
         body_->setInterpolationWorldTransform(interpTrans);
-        body_->updateInertiaTensor();
 
         Activate();
         MarkNetworkUpdate();