Help, Custom projectile disappears and doesn't stick to ground

I'm still new to Mcreator that's why I ask here for help. The problem is whenever I shoot with my bow or throw a spear like a Trident the projectile always doesn't stick to a block like a normal arrow or trident would do. That's why I'm hoping to get some help with my situation because I followed one tutorial on YouTube and it seems different and doesn't work for me plus it's still different from what I'm hoping to achieve I want my spear to land on the ground like a Trident or the arrow sticks to the ground.