Ever since the 16w21a snapshot release the Update notes when you are about to press play aren't showing up and effects the skins of other players on servers, realms, and singleplayer.
What i expected to happen:When I get to the play button to play Minecraft I would see the update notes and my skin would show up
What happened:The update notes wouldn't show up and my skin and others would not show, only as default
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Please force a crash by holding F3+C for 10 seconds and attach the resulting crash report here.

---- Minecraft Crash Report ----
// This doesn't make any sense!
Time: 6/2/16 12:29 PM
Description: Manually triggered debug crash
java.lang.Throwable
at bcd.az(SourceFile:1701)
at bcd.t(SourceFile:1622)
at bcd.av(SourceFile:969)
at bcd.a(SourceFile:399)
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 --
Thread: Client thread
Stacktrace:
at bcd.az(SourceFile:1701)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bmr['Glory_Dandere36'/22, l='MpServer', x=-171.81, y=85.00, z=244.98]]
Chunk stats: MultiplayerChunkCache: 1089, 1089
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-136,64,252), Chunk: (at 8,4,12 in -9,15; contains blocks -144,0,240 to -129,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 94354 game time, 94354 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: 20 total; [wg['Squid'/1, l='MpServer', x=-221.21, y=56.62, z=244.91], vu['Bat'/2, l='MpServer', x=-195.11, y=28.94, z=261.74], vu['Bat'/3, l='MpServer', x=-149.75, y=15.23, z=208.81], vu['Bat'/4, l='MpServer', x=-142.24, y=49.99, z=184.73], vu['Bat'/5, l='MpServer', x=-146.89, y=53.10, z=222.47], vu['Bat'/6, l='MpServer', x=-131.25, y=30.10, z=206.59], vu['Bat'/7, l='MpServer', x=-135.55, y=27.05, z=202.35], vu['Bat'/8, l='MpServer', x=-146.48, y=45.99, z=197.25], vu['Bat'/9, l='MpServer', x=-128.52, y=49.10, z=229.75], vu['Bat'/10, l='MpServer', x=-120.34, y=43.34, z=255.76], vu['Bat'/11, l='MpServer', x=-124.32, y=55.10, z=192.25], vu['Bat'/12, l='MpServer', x=-122.25, y=39.99, z=215.20], vu['Bat'/13, l='MpServer', x=-123.36, y=42.18, z=255.37], vu['Bat'/14, l='MpServer', x=-121.54, y=29.40, z=266.44], bmr['Glory_Dandere36'/22, l='MpServer', x=-171.81, y=85.00, z=244.98], wg['Squid'/15, l='MpServer', x=-109.53, y=60.83, z=279.22], wg['Squid'/16, l='MpServer', x=-119.60, y=60.93, z=286.40], wg['Squid'/17, l='MpServer', x=-115.89, y=61.48, z=293.90], wg['Squid'/18, l='MpServer', x=-112.94, y=61.25, z=291.60], vu['Bat'/19, l='MpServer', x=-108.25, y=32.10, z=194.25]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Integrated singleplayer server
Stacktrace:
at bks.a(SourceFile:365)
at bcd.b(SourceFile:2521)
at bcd.a(SourceFile:408)
at net.minecraft.client.main.Main.main(SourceFile:124)
-- System Details --
Details:
Minecraft Version: 1.9.4
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 208566848 bytes (198 MB) / 438136832 bytes (417 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.9.4
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 4400 GL version 4.3.0 - Build 20.19.15.4331, Intel
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: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: bcd$7@39303a6

I'm also having this same issue, how could I fix the network issue so it will work again?

Is this still a concern in the current Minecraft Launcher version 2.0.805 / 2.0.806? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. It will be reopened it as soon as the requested information has been delivered.
Probably a network issue.