Just some quick thought:
1 - how are you adding the static in BP? Is it a component that you add in the Pawn Actor?
2 - Have you tried to make your Shield a standalone actor that you Spawn & Attached to your Pawn? So the colision actors will be different so your collision will work for your shield (if setup properly).
3 - Have you tried to activate: Show Collision in your editor command so you can see the the collision of the different actor in the world? Are they exactly where you think they should be?