Stryker

Had the same issue ever since 1.13, disabling Discord and making sure the game does not launch in full screen seems to be a fix, guessing its not a issue with the game code but rather discord overlay causing further issues. 

Ah I see, thanks a lot for redirecting me-- apologies for posting here. 

I have a very similar issue where when I launch the game it goes through its regular process and once it gets past the Mojang screen the title screen shows up and it just freezes. If I do nothing the game remains frozen, if I try to click then windows opens up the prompt for me to 'close the program' or 'wait for it to respond' 

This issue only occurs on my laptop so for now I'm stuck playing on my desktop computer. My friend had the exact same issue with his laptop when the update first came out. 

*Edit: This STILL occurs for me on 1.13.1 Pre-1

This is still an issue for me on 1.13.1 Pre-1, messing with resolution settings in launcher did not fix. 

Confirmed for MC 1.9 pre2.
If levitation is applied while gliding, it will have no impact. However once you touch the ground it will begin.

Confirmed in MC 1.9 pre2

I can't confirm this for 1.9 pre2. If the wings are activated when falling, you will bounce off the slime block as usual.

Elytra seems to always activate whenever holding space in water, and once you swim to the surface it will cause you to glide face down.

Have not been able to reproduce in 1.9 pre2

Confirmed for 1.9 pre2
I would very much agree that this is just block lag.
However there are some cases where my computer set up should be plenty good enough to handle simple things like this, and it should not be a problem for the block to update.

At any speed where the block you are currently mining is instant. So a diamond pick with haste 2 on stone would qualify.

Or a hand with haste 100, works the same.

This has been a problem for quite some time. I have experienced it many times when working with the haste effect. I strongly recommend you update the effected versions so Mojang notices it and treats it with higher priority.
Edit: Only seems to happen when high levels of haste are applied causing instant mining.
Confirmed for snapshot 15w47a

Here is a forced crash report I did recently after experiencing the issue:
---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 11/18/15 8:57 PM
Description: Manually triggered debug crash

java.lang.Throwable
	at bbz.aw(SourceFile:1672)
	at bbz.s(SourceFile:1593)
	at bbz.as(SourceFile:941)
	at bbz.a(SourceFile:385)
	at net.minecraft.client.main.Main.main(SourceFile:122)


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

-- Head --
Stacktrace:
	at bbz.aw(SourceFile:1672)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bmf['StryTech'/200, l='MpServer', x=-272.39, y=63.00, z=256.70]]
	Chunk stats: MultiplayerChunkCache: 572, 572
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-228,64,252), Chunk: (at 12,4,12 in -15,15; contains blocks -240,0,240 to -225,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 3570 game time, 3570 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: 113 total; [wa['Sheep'/37, l='MpServer', x=-346.16, y=70.00, z=336.25], wa['Sheep'/39, l='MpServer', x=-347.47, y=70.00, z=331.06], wa['Sheep'/45, l='MpServer', x=-335.50, y=63.00, z=177.50], wa['Sheep'/46, l='MpServer', x=-327.94, y=65.00, z=187.00], wa['Sheep'/47, l='MpServer', x=-331.41, y=65.00, z=179.50], wa['Sheep'/48, l='MpServer', x=-326.56, y=64.00, z=205.50], wa['Sheep'/49, l='MpServer', x=-325.47, y=64.00, z=205.50], wa['Sheep'/50, l='MpServer', x=-323.50, y=65.00, z=201.50], wa['Sheep'/51, l='MpServer', x=-320.50, y=65.00, z=205.50], vy['Pig'/64, l='MpServer', x=-289.50, y=69.00, z=331.50], vy['Pig'/65, l='MpServer', x=-297.13, y=70.00, z=335.09], vy['Pig'/66, l='MpServer', x=-288.50, y=69.00, z=332.50], vy['Pig'/67, l='MpServer', x=-289.88, y=69.00, z=327.78], vu['Cow'/72, l='MpServer', x=-276.50, y=69.00, z=319.50], vu['Cow'/73, l='MpServer', x=-275.50, y=69.00, z=318.50], vu['Cow'/74, l='MpServer', x=-276.50, y=69.00, z=320.50], vu['Cow'/75, l='MpServer', x=-276.50, y=69.00, z=319.50], wa['Sheep'/76, l='MpServer', x=-243.06, y=70.00, z=211.44], wa['Sheep'/77, l='MpServer', x=-246.66, y=69.00, z=206.81], wa['Sheep'/78, l='MpServer', x=-247.03, y=69.00, z=205.28], wa['Sheep'/79, l='MpServer', x=-248.22, y=73.00, z=194.53], xz['item.tile.mushroom'/81, l='MpServer', x=-261.38, y=28.00, z=251.81], xz['item.tile.mushroom'/82, l='MpServer', x=-260.38, y=28.00, z=250.91], vu['Cow'/83, l='MpServer', x=-228.56, y=70.00, z=256.13], vu['Cow'/84, l='MpServer', x=-237.16, y=67.00, z=261.44], vu['Cow'/85, l='MpServer', x=-248.91, y=69.00, z=269.59], vu['Cow'/86, l='MpServer', x=-284.13, y=69.00, z=286.00], wa['Sheep'/91, l='MpServer', x=-211.16, y=71.00, z=196.50], wa['Sheep'/92, l='MpServer', x=-219.13, y=71.00, z=184.44], wa['Sheep'/93, l='MpServer', x=-226.72, y=72.00, z=201.88], wa['Sheep'/94, l='MpServer', x=-224.50, y=72.00, z=199.50], wa['Sheep'/95, l='MpServer', x=-216.47, y=64.00, z=264.44], wa['Sheep'/96, l='MpServer', x=-236.44, y=60.00, z=281.91], wa['Sheep'/97, l='MpServer', x=-217.56, y=65.00, z=265.03], wa['Sheep'/98, l='MpServer', x=-216.03, y=64.00, z=265.75], zj['Villager'/104, l='MpServer', x=-206.50, y=66.00, z=336.50], wa['Sheep'/113, l='MpServer', x=-194.50, y=68.00, z=292.50], wa['Sheep'/116, l='MpServer', x=-195.50, y=68.00, z=294.50], zd['Spider'/10382, l='MpServer', x=-342.50, y=44.00, z=215.50], zd['Spider'/10383, l='MpServer', x=-339.50, y=44.00, z=213.50], zf['Zombie'/8342, l='MpServer', x=-330.50, y=14.00, z=195.50], bmf['StryTech'/200, l='MpServer', x=-272.39, y=63.00, z=256.70], xz['item.tile.dirt.default'/8413, l='MpServer', x=-249.88, y=70.00, z=250.91], zf['Zombie'/10480, l='MpServer', x=-297.50, y=13.00, z=303.50], yo['Enderman'/10481, l='MpServer', x=-292.44, y=12.00, z=295.66], yo['Enderman'/10482, l='MpServer', x=-296.50, y=13.00, z=302.50], zd['Spider'/8519, l='MpServer', x=-316.50, y=19.00, z=235.50], zd['Spider'/8531, l='MpServer', x=-317.50, y=35.00, z=291.50], zb['Skeleton'/10638, l='MpServer', x=-248.50, y=39.00, z=306.50], zf['Zombie'/10639, l='MpServer', x=-251.50, y=39.00, z=307.50], zf['Zombie'/10640, l='MpServer', x=-248.50, y=39.00, z=306.50], zf['Zombie'/8662, l='MpServer', x=-278.50, y=21.00, z=221.50], zf['Zombie'/6616, l='MpServer', x=-271.69, y=52.00, z=249.69], zf['Zombie'/6617, l='MpServer', x=-271.06, y=52.00, z=249.47], zb['Skeleton'/10715, l='MpServer', x=-327.50, y=36.00, z=184.50], zb['Skeleton'/10716, l='MpServer', x=-325.50, y=36.00, z=183.50], vq['Bat'/10726, l='MpServer', x=-236.41, y=17.09, z=282.51], yn['Creeper'/8686, l='MpServer', x=-304.50, y=40.00, z=240.50], vq['Bat'/10776, l='MpServer', x=-283.51, y=33.98, z=238.54], vq['Bat'/10777, l='MpServer', x=-285.51, y=37.38, z=235.42], xz['item.tile.dirt.default'/8789, l='MpServer', x=-257.13, y=67.00, z=256.88], zf['Zombie'/602, l='MpServer', x=-318.50, y=35.00, z=217.50], zb['Skeleton'/10844, l='MpServer', x=-328.50, y=39.00, z=191.50], zf['Zombie'/10845, l='MpServer', x=-348.50, y=46.00, z=221.50], zb['Skeleton'/670, l='MpServer', x=-287.69, y=50.00, z=286.91], zd['Spider'/672, l='MpServer', x=-273.72, y=52.09, z=277.53], zb['Skeleton'/8872, l='MpServer', x=-282.50, y=31.00, z=310.50], yn['Creeper'/8874, l='MpServer', x=-270.50, y=34.00, z=251.50], vq['Bat'/10951, l='MpServer', x=-285.49, y=53.04, z=294.95], vq['Bat'/10953, l='MpServer', x=-286.16, y=53.07, z=296.97], vq['Bat'/10954, l='MpServer', x=-278.66, y=52.06, z=279.53], vq['Bat'/10955, l='MpServer', x=-279.54, y=49.00, z=274.25], vq['Bat'/733, l='MpServer', x=-265.21, y=28.73, z=250.55], yn['Creeper'/8937, l='MpServer', x=-230.50, y=33.00, z=266.50], yn['Creeper'/8938, l='MpServer', x=-231.50, y=33.00, z=263.50], zb['Skeleton'/11024, l='MpServer', x=-315.50, y=38.00, z=205.50], zb['Skeleton'/11025, l='MpServer', x=-316.50, y=38.00, z=204.50], yn['Creeper'/9002, l='MpServer', x=-318.38, y=34.00, z=298.00], zb['Skeleton'/11052, l='MpServer', x=-332.50, y=14.00, z=201.50], xz['item.tile.dirt.default'/9045, l='MpServer', x=-275.88, y=66.00, z=256.13], xz['item.tile.stonebrick'/9131, l='MpServer', x=-268.44, y=60.00, z=256.13], xz['item.tile.gravel'/5064, l='MpServer', x=-257.13, y=47.00, z=294.88], zd['Spider'/972, l='MpServer', x=-277.50, y=48.00, z=276.50], xz['item.tile.stonebrick'/9246, l='MpServer', x=-273.88, y=62.00, z=255.88], xz['item.tile.stone.granite'/9301, l='MpServer', x=-265.31, y=65.00, z=255.38], xz['item.tile.stonebrick'/9333, l='MpServer', x=-273.88, y=65.00, z=254.13], vq['Bat'/9350, l='MpServer', x=-250.57, y=34.06, z=287.09], xz['item.tile.dirt.default'/7306, l='MpServer', x=-260.75, y=65.00, z=279.13], xz['item.item.seeds'/5326, l='MpServer', x=-263.47, y=69.00, z=238.69], zb['Skeleton'/5489, l='MpServer', x=-322.50, y=38.00, z=198.50], zb['Skeleton'/7551, l='MpServer', x=-288.50, y=48.00, z=232.50], zf['Zombie'/7555, l='MpServer', x=-290.50, y=48.00, z=231.50], zf['Zombie'/7559, l='MpServer', x=-235.50, y=34.00, z=252.50], yn['Creeper'/9608, l='MpServer', x=-256.50, y=31.00, z=308.50], zb['Skeleton'/7571, l='MpServer', x=-287.00, y=50.00, z=287.72], zb['Skeleton'/7572, l='MpServer', x=-280.22, y=50.00, z=279.53], zb['Skeleton'/7573, l='MpServer', x=-279.91, y=50.00, z=280.44], zb['Skeleton'/7659, l='MpServer', x=-314.50, y=23.00, z=241.50], yn['Creeper'/9743, l='MpServer', x=-332.50, y=15.00, z=312.50], zb['Skeleton'/9770, l='MpServer', x=-305.50, y=39.00, z=245.50], yn['Creeper'/9810, l='MpServer', x=-202.50, y=26.00, z=267.50], vq['Bat'/7763, l='MpServer', x=-324.25, y=41.10, z=196.78], zf['Zombie'/9904, l='MpServer', x=-225.50, y=15.00, z=261.50], zf['Zombie'/7873, l='MpServer', x=-328.50, y=13.00, z=274.50], zf['Zombie'/9921, l='MpServer', x=-296.50, y=48.00, z=232.50], zf['Zombie'/9922, l='MpServer', x=-297.53, y=49.00, z=232.19], zd['Spider'/9923, l='MpServer', x=-292.50, y=48.00, z=234.50], zf['Zombie'/5863, l='MpServer', x=-295.50, y=25.00, z=242.50], zd['Spider'/9971, l='MpServer', x=-303.50, y=14.00, z=193.50], yn['Creeper'/8025, l='MpServer', x=-339.50, y=11.00, z=202.50], zf['Zombie'/10141, l='MpServer', x=-276.50, y=33.00, z=245.50], vq['Bat'/8145, l='MpServer', x=-293.59, y=49.38, z=214.50], xz['item.tile.dirt.default'/8161, l='MpServer', x=-254.41, y=71.00, z=259.00]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bkg.a(SourceFile:363)
	at bbz.b(SourceFile:2493)
	at bbz.a(SourceFile:394)
	at net.minecraft.client.main.Main.main(SourceFile:122)

-- System Details --
Details:
	Minecraft Version: 15w47a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 270523296 bytes (257 MB) / 600899584 bytes (573 MB) up to 12871532544 bytes (12275 MB)
	JVM Flags: 7 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -Xmx12288m
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 15w47a
	LWJGL: 2.9.4
	OpenGL: GeForce GTX 960/PCIe/SSE2 GL version 4.5.0 NVIDIA 358.91, 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: English (US)
	Profiler Position: N/A (disabled)
	CPU: 2x Intel(R) Pentium(R) CPU G3258 @ 3.20GHz