Still happens to every chunk, in 1.15.2 and the newest 20w06a snapshot, both singleplayer and multiplayer. The fps drops don't occur in 1.12.2 and versions below.
hapdragging
Still happens to every chunk, in 1.15.2 and the newest 20w06a snapshot, both singleplayer and multiplayer. The fps drops don't occur in 1.12.2 and versions below.