Bricks are not critical data. Players, items and objects that moves are in other hand. The only thing that could be critical with bricks is when they change form, like color, colorFX and shapeFX. Although, as I thought I said, bricks you see is not critical, and when you suddenly reach those bricks that is cached, it will first take them out from the cache, then update as usual(Have you ever first seen brick ghosting, leaving for about 10000 TGE units and then come back to see that there is more bricks someone have placed while you was away?), and then it's done.(And about 10 more thing in between that, but we really don't have to go that detailed...)