Static mesh collision won't affect not moving cloth object

Hi guys
I’m new too UE4 and I’m trying to create a curtain with 4.16 cloth system. So far I managed to create a cloth and make it collide with static mesh but when my curtain is static and not moving, the curtain skeletal mesh won’t collide with static mesh.As you can see in this video the middle curtain has this problem when it stop moving but the others don’t have because they are moving. So can you please tell me what I’m doing wrong?