chunks disappear when you start the game (sometimes)

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

When having this issue:

Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher.

If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

Well, something like this?

minecraft/crash-reports/crash-<---- Minecraft Crash Report ----
// There are four lights!

Time: 17/04/15 01:16 AM
Description: Manually triggered debug crash

java.lang.Throwable
	at avf.s(SourceFile:1587)
	at avf.av(SourceFile:888)
	at avf.a(SourceFile:325)
	at net.minecraft.client.main.Main.main(SourceFile:124)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bdc.a(SourceFile:309)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bex['Stanford Pines'/104, l='MpServer', x=-789,43, y=73,62, z=-320,92]]
	Chunk stats: MultiplayerChunkCache: 272, 272
	Level seed: 0
	Level generator: ID 04 - customized, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: -92,00,64,00,200,00 - World: (-92,64,200), Chunk: (at 4,4,8 in -6,12; contains blocks -96,0,192 to -81,255,207), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 1788267 game time, 100138 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 78 total; [va['item.item.bone'/256, l='MpServer', x=-748,19, y=77,00, z=-340,19], tw['Oveja'/257, l='MpServer', x=-744,34, y=72,00, z=-274,50], tv['Conejo'/258, l='MpServer', x=-744,88, y=70,00, z=-261,78], vo['Creeper'/130, l='MpServer', x=-868,59, y=43,00, z=-361,44], vo['Creeper'/131, l='MpServer', x=-869,50, y=43,00, z=-360,50], vo['Creeper'/132, l='MpServer', x=-864,78, y=43,00, z=-358,72], tv['Conejo'/134, l='MpServer', x=-866,72, y=67,00, z=-349,81], tl['Murciélago'/135, l='MpServer', x=-862,25, y=57,10, z=-329,25], tp['Vaca'/264, l='MpServer', x=-735,72, y=64,00, z=-372,28], tv['Conejo'/136, l='MpServer', x=-868,28, y=72,00, z=-297,25], vc['container.minecart'/265, l='MpServer', x=-723,50, y=41,06, z=-362,50], tu['Cerdo'/137, l='MpServer', x=-851,59, y=79,00, z=-390,31], tp['Vaca'/266, l='MpServer', x=-730,78, y=77,00, z=-336,81], tv['Conejo'/138, l='MpServer', x=-853,28, y=75,00, z=-379,53], tp['Vaca'/267, l='MpServer', x=-735,09, y=73,00, z=-344,97], to['Pollo'/139, l='MpServer', x=-851,72, y=69,00, z=-374,41], tl['Murciélago'/268, l='MpServer', x=-734,50, y=15,00, z=-300,15], tv['Conejo'/140, l='MpServer', x=-860,19, y=67,00, z=-357,50], tl['Murciélago'/269, l='MpServer', x=-742,09, y=13,00, z=-298,25], wb['Esqueleto'/141, l='MpServer', x=-849,50, y=34,00, z=-337,50], tv['Conejo'/142, l='MpServer', x=-860,94, y=63,00, z=-336,31], tv['Conejo'/143, l='MpServer', x=-857,41, y=63,00, z=-347,44], tu['Cerdo'/144, l='MpServer', x=-850,88, y=64,00, z=-344,91], tv['Conejo'/145, l='MpServer', x=-853,22, y=64,00, z=-349,97], vc['container.minecart'/273, l='MpServer', x=-712,50, y=47,06, z=-395,13], tp['Vaca'/146, l='MpServer', x=-844,53, y=69,00, z=-330,16], tl['Murciélago'/147, l='MpServer', x=-855,57, y=50,06, z=-308,26], tu['Cerdo'/275, l='MpServer', x=-714,50, y=68,00, z=-357,03], tv['Conejo'/148, l='MpServer', x=-864,19, y=64,00, z=-323,53], tv['Conejo'/149, l='MpServer', x=-857,28, y=70,00, z=-324,91], tp['Vaca'/150, l='MpServer', x=-856,59, y=80,00, z=-309,75], tp['Vaca'/151, l='MpServer', x=-853,41, y=82,00, z=-277,66], tv['Conejo'/152, l='MpServer', x=-849,72, y=70,00, z=-254,25], tv['Conejo'/153, l='MpServer', x=-855,50, y=67,00, z=-242,31], tv['Conejo'/155, l='MpServer', x=-836,75, y=82,00, z=-374,53], tv['Conejo'/156, l='MpServer', x=-832,91, y=71,00, z=-362,72], tv['Conejo'/157, l='MpServer', x=-851,13, y=67,00, z=-356,28], tp['Vaca'/158, l='MpServer', x=-832,56, y=75,00, z=-278,78], to['Pollo'/159, l='MpServer', x=-835,72, y=84,00, z=-266,41], va['item.item.egg'/160, l='MpServer', x=-835,78, y=84,00, z=-266,88], tv['Conejo'/161, l='MpServer', x=-846,13, y=64,00, z=-249,03], tv['Conejo'/164, l='MpServer', x=-825,47, y=73,00, z=-385,19], vo['Creeper'/165, l='MpServer', x=-830,50, y=47,00, z=-383,50], wf['Zombi'/166, l='MpServer', x=-829,50, y=54,00, z=-286,50], tv['Conejo'/167, l='MpServer', x=-814,03, y=68,00, z=-257,50], wd['Araña'/191, l='MpServer', x=-809,31, y=42,00, z=-253,03], tv['Conejo'/192, l='MpServer', x=-806,28, y=70,00, z=-248,31], tp['Vaca'/203, l='MpServer', x=-785,78, y=68,00, z=-370,63], wj['Aldeano'/204, l='MpServer', x=-797,91, y=67,00, z=-310,69], ty['Calamar'/332, l='MpServer', x=-805,63, y=59,91, z=-382,56], wf['Zombi'/205, l='MpServer', x=-799,31, y=69,00, z=-310,94], wf['Zombi'/206, l='MpServer', x=-799,81, y=69,00, z=-310,09], ty['Calamar'/336, l='MpServer', x=-775,06, y=61,38, z=-375,88], ty['Calamar'/337, l='MpServer', x=-777,22, y=61,03, z=-373,91], ty['Calamar'/338, l='MpServer', x=-769,66, y=61,44, z=-381,22], ty['Calamar'/339, l='MpServer', x=-773,78, y=61,41, z=-376,94], tl['Murciélago'/224, l='MpServer', x=-785,63, y=28,09, z=-380,01], vo['Creeper'/225, l='MpServer', x=-776,03, y=22,00, z=-349,72], wd['Araña'/226, l='MpServer', x=-762,72, y=19,00, z=-335,94], wb['Esqueleto'/227, l='MpServer', x=-777,50, y=37,00, z=-263,50], wb['Esqueleto'/228, l='MpServer', x=-769,50, y=37,00, z=-256,50], vc['container.minecart'/238, l='MpServer', x=-764,50, y=47,06, z=-399,13], tv['Conejo'/239, l='MpServer', x=-765,72, y=65,00, z=-395,81], tv['Conejo'/240, l='MpServer', x=-759,06, y=64,00, z=-392,97], wf['Zombi'/241, l='MpServer', x=-762,50, y=18,00, z=-344,50], wf['Zombi'/242, l='MpServer', x=-761,88, y=18,00, z=-338,81], vo['Creeper'/243, l='MpServer', x=-755,94, y=17,00, z=-318,66], wf['Zombi'/244, l='MpServer', x=-753,50, y=17,00, z=-315,50], wf['Zombi'/245, l='MpServer', x=-754,50, y=17,00, z=-315,50], wf['Zombi'/246, l='MpServer', x=-754,50, y=17,00, z=-310,50], wf['Zombi'/247, l='MpServer', x=-764,59, y=45,00, z=-282,50], tv['Conejo'/248, l='MpServer', x=-753,97, y=66,00, z=-267,06], tv['Conejo'/249, l='MpServer', x=-754,56, y=64,00, z=-252,34], vc['container.minecart'/252, l='MpServer', x=-742,53, y=42,00, z=-396,25], bex['Stanford Pines'/104, l='MpServer', x=-789,43, y=73,62, z=-320,92], tp['Vaca'/253, l='MpServer', x=-740,50, y=70,00, z=-386,50], tp['Vaca'/254, l='MpServer', x=-739,50, y=69,00, z=-388,50], tv['Conejo'/255, l='MpServer', x=-742,31, y=64,00, z=-391,75]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bdc.a(SourceFile:309)
	at avf.b(SourceFile:2296)
	at avf.a(SourceFile:334)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.8.3
	Operating System: Windows 8.1 (x86) version 6.3
	CPU: 4x Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz
	Java Version: 1.8.0_31, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 151706528 bytes (144 MB) / 408449024 bytes (389 MB) up to 523501568 bytes (499 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 1.8.3
	LWJGL: 2.9.4
	OpenGL: GeForce GT 610/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Español (México)
	Profiler Position: N/A (disabled)

	at ani.a(SourceFile:255)
	at ani$a.close(SourceFile:236)#@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Wrecker\AppData\Roaming\.minecraft\crash-reports\crash-2015-04-17_01.16.21-client.txt

	at java.util.zip.DeflaterOutputStream.close(Unknown Source)
	at java.io.FilterOutputStream.close(Unknown Source)
	at ank.a(SourceFile:163)
	at ank.c(SourceFile:151)
	at aud.c(SourceFile:37)
	at aud.run(SourceFile:30)
	at java.lang.Thread.run(Unknown Source)
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release>-client.txt

Well, i'm new in this forum (or something like that). Well, if i'm having that error or bug again, i'll have to press again F3+C and and copy and paste the data like i did it, really?

Well, yes, the first part ("forced crash") is done.
For the second part: Trigger the issue again (or wait until it happens) and after that attach the complete output of the "Game Output" console.

Ticket resolved as incomplete, because no answer in a reasonable amount of time (1+ year), if it still happens, please update the ticket.