One player is kicked once they join a server. Very inconsistent.

This error did not occur on 18w01a, but now happened once the player upgraded to 18w08b. They attempted to join the server, and crash with the following error:

---- Minecraft Crash Report ---- // You're mean.
Time: 2/26/18 6:16 PM Description: Unexpected error

java.lang.NullPointerException: Unexpected error 
at vo$a.a(SourceFile:77) 
at vo$a.a(SourceFile:63) 
at aye.a(SourceFile:210) 
at bgg.a(SourceFile:263) 
at abe.a(SourceFile:1105)
at cle.b(SourceFile:1196) 
at cle.a(SourceFile:1096) 
at cle.a(SourceFile:957) 
at bya.b(SourceFile:820) 
at bya.a(SourceFile:381) 
at net.minecraft.client.main.Main.main(SourceFile:141)

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

-- Head -- Thread: Client thread Stacktrace: at vo$a.a(SourceFile:77) at vo$a.a(SourceFile:63) at aye.a(SourceFile:210) at bgg.a(SourceFile:263) at abe.a(SourceFile:1105) at cle.b(SourceFile:1196) at cle.a(SourceFile:1096)
-- Affected level -- Details: Level name: MpServer All players: 1 total; [ckr['Name'/19522, l='MpServer', x=8.50, y=65.00, z=8.50]] Chunk stats: MultiplayerChunkCache: 18, 18 Level seed: 0 Level generator: ID 00 - default, ver 1. Features enabled: false Level generator options: Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Level time: 4 game time, 4 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: survival (ID 0). Hardcore: false. Cheats: false Forced entities: 1 total; [ckr['Name'/19522, l='MpServer', x=8.50, y=65.00, z=8.50]] Retry entities: 0 total; [] Server brand: vanilla Server type: Non-integrated multiplayer server Stacktrace: at cio.a(SourceFile:368) at bya.b(SourceFile:1827) at bya.a(SourceFile:394) at net.minecraft.client.main.Main.main(SourceFile:141)
-- System Details -- Details: Minecraft Version: 18w08b Operating System: Windows 7 (x86) version 6.1 Java Version: 1.8.0_25, Oracle Corporation Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation Memory: 99818336 bytes (95 MB) / 218103808 bytes (208 MB) up to 1073741824 bytes (1024 MB) JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M Launched Version: 18w08b LWJGL: 3.1.2 build 29 OpenGL: Intel Cantiga GL version 1.5.0 - Build 7.15.10.1518, Intel GL Caps: Using GL 1.3 multitexturing. Using GL 1.3 texture combiners. Not using framebuffer objects because OpenGL 1.4 is not supported, EXT_blend_func_separate is supported, OpenGL 3.0 is not supported, ARB_framebuffer_object is not supported, and EXT_framebuffer_object is not supported. Shaders are not available because OpenGL 2.1 is not supported, ARB_shader_objects is not supported, ARB_vertex_shader is not supported, and ARB_fragment_shader is not 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: vanilla
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 2x Pentium(R) Dual-Core CPU T4200 @ 2.00GHz

The server has been having inconsistent errors, either being:

Name has disconnected, reason: Disconnected

, or

Name has disconnected, reason: Internal Exception: io.netty.channel.unix.Errors$NativeIoException: syscall:read(..) failed: Connection reset by peer

It is a very odd error, and doesn't seem to be caused by any exterior software.

The user is on a windows machine, and does not have any firewalls or anti-virus software installed.

They can join for from 1-10 seconds, and then promptly crash.