I got a reply about cashworks in a clan im with:
I saw the cart actually STALL at the top of the hill right after capture point #1 in Cashworks, where it goes to angle downwards.... even with 4 players pushing it at no one blocking. It just, stopped. However, when everyone backed off of it and it moved backwards, the game progressed as normal. Just an FYI, for if it happens to any of you.