new forge bug discovered

so before the recent update, my forged maps worked just fine. After the update, I placed a ball spawn and score zone. During a playtest of one bomb assault, I discovered that some of my boulder pieces were ghosts. They appeared to be present, but I can walk and shoot right through them during any custom game. In forge, the objects are solid as they should be. Anyone else experience this issue?

the map is called castle whitewolf, a great attack and defend map reminiscent of high ground from Halo 3

Do you mean ghost like the vehicle, or ghost as in not a physical object?