I’m new to unreal engine, the global setting is clean, and we i setup a test for collision(as follows), setting the sphere to blockalldynamic, and the sphere goes through the wall(which should stop) [微信图片_20240818231431] [微信图片_20240818231439] did I miss something here?

Make the basic collision shape the root component. Projectiles only register collisions on the upper most root element that is a collision primitive.