[MC-4001] Chunk reverts to an earlier state

A chunk of my world is defect. When i place a block or remove it and i relog in the world, the placed block is disappeared and the removed block is back. So you cant change anything in the chunk.

The following found in the devconsole:

[18:38:09 INFO]: Client> [18:38:09] [Server thread/INFO]: Saving chunks for level '14w08a'/Overworld
[18:38:09 INFO]: Client> s: Saving entity NBT
[18:38:09 INFO]: Client> 	at sk.e(SourceFile:1123)
[18:38:09 INFO]: Client> 	at sk.d(SourceFile:1090)
[18:38:09 INFO]: Client> 	at atc.a(SourceFile:210)
[18:38:09 INFO]: Client> 	at atc.a(SourceFile:99)
[18:38:09 INFO]: Client> 	at oa.b(SourceFile:161)
[18:38:09 INFO]: Client> 	at oa.a(SourceFile:192)
[18:38:09 INFO]: Client> 	at ob.a(SourceFile:663)
[18:38:09 INFO]: Client> 	at net.minecraft.server.MinecraftServer.a(SourceFile:305)
[18:38:09 INFO]: Client> 	at cby.v(SourceFile:124)
[18:38:09 INFO]: Client> 	at net.minecraft.server.MinecraftServer.run(SourceFile:387)
[18:38:09 INFO]: Client> 	at mr.run(SourceFile:657)
[18:38:09 INFO]: Client> Caused by: java.lang.NullPointerException
[18:38:09 INFO]: Client> 	at aik.j(SourceFile:115)
[18:38:09 INFO]: Client> 	at ail.a(SourceFile:125)
[18:38:09 INFO]: Client> 	at aai.b(SourceFile:206)
[18:38:09 INFO]: Client> 	at sk.e(SourceFile:1111)