Falling blocks on server restart

[InventivetalentDev]

Blocks tend to fall randomly and re-appear. The blocks don't get highlighted which leads me to believe they don't really exist... Can get stuck in them as well as if you are in an unloaded chunk. Video shows what is happens. Sorry for the music in it, just mute the video.

Hopefully this gets fixed.

Video: http://plays.tv/video/56ee55640993662bb4

[SoraShiunin]

Another example here. This one is slighly different because it also got pushed by water, the green bar is a green glass pane because blocks like those and slime blocks seem weird when turned into advanced slabs.
It also happens with microblocks in paths.

It seems that they aren't actually deleted.
https://i.gyazo.com/3d9753a163e3a4eb956bb8ed5095c5d1.mp4

(Thank you for the new jam)