Lag spikes are same as usual but some are worse than normal, causes player to glitch back in time, blocks respawn after being broken before a lag spike, items don't get picked up or dropped when attempted, fall damage taken after some large lag spikes even if the player didn't move during the lag spike, fall damage taken in water after lag spikes, lots of unusually strong lag, not caused by wi-fi or network, computer running fine, noticed in a survival world created in same snapshot.