Reach Forge- Objects flickering, can't spawn more

For whatever reason, I’m forging in forge world, and my map I’m creating is densely populated with objects- however, despite only using about half of the expanded budget that MCC allows for, now the objects are flickering and I can’t place any more. Does anyone know a solution to this? Anyone know why this might be happening?

This happens when you reach or nearly reach the max item limit which is 650 objects, the flickering is caused by that many objects on screen at the same time and not being able to place objects anymore is the 650 item limit