Lag spikes while placing/breaking blocks

Hi, since Minecraft 18w43 I'm noticing lag spikes within the game.

The world (seed: -4689860770415580557) I tested this on has been newly generated with the specified snapshot version.

Steps to reproduce:

• Place or break a block. (tested in Creative Mode with and without moving)
  I'm using the default launcher options, thus Minecraft starts with whatever is specified as the default value within the Minecraft Launcher (v2.1.1462) on Windows.