2.2.15 changes:
Bug fixes:
Fixed position place false when inside of blocks
Fixed a false when block clutching with scaffolding
Removed the warning for empty chunk corruption due to it not really mattering, although the server still shouldn't do that
Refactored bounce block uncertainty, with slime blocks and beds, to fix falses near slime blocks and beds
Fixed sneaking falses for 1.14.0-1.14.4 clients. Pre-1.14 and post 1.14 clients were not affected.

Bypass fixes:
Fixed ability to ignore velocity when placing a block under yourself within 0.03 blocks
Fixed ability to ignore velocity by jumping when near blocks
Fixed ability to tower by strategically setting yourself back to reduce jump height and ignoring velocity
Spamming movements, flagging reach, to interpolate faster no longer works.
Fixed ability to teleport a vehicle, and then re-enter that vehicle, as re-entering a vehicle is forced to wait 3 ticks
Fixed ability to fly with pigs and striders to fly due to some really shitty mojang netcode, thanks mojang.
Fixed ability to give vehicle control to the server when the client is still controlling the vehicle
Fixed ability to rapidly enter and exit a vehicle in order to gain large lenience

Features:
Aggressively cancel attacks when the player isn't looking at the enemy, when the user has recently flagged the stable check for not looking at the enemy
Added end crystals to reach check, to target crystalaura

2.2.15 hotfix 1 changes:
Fixed a deadlock from 2.2.15 if you attack an entity and it despawns the next tick, you should likely update if you are on 2.2.15
Added chunk compression for 1.8 servers to reduce the world tracker to around 1/4th the size

2.2.16 changes:
This jar fixes a memory leak when combining PacketEvents 2.0 with ViaVersion.