Treyarch has released a new Game Settings Update on PlayStation 4 and Xbox One that has brought stability improvements to the Zombies maps, as many players were reporting game crashes during the Easter Egg hunt. Today’s update reduce the crashes across all the of Zombies maps.
We’ve just updated #BlackOps4 on PS4 and Xbox One with significant stability improvements across all Zombies maps, including fixes to the Easter Egg quests. PC update coming shortly. Thanks again for your patience!
— Treyarch Studios (@Treyarch) October 17, 2018
The update also brought some fixes to the Easter Egg quests, which should help players who were getting the blue screen as you progressed through the Easter Eggs on Zombies maps. The update is coming soon to PC.