server-side issues
MCL-776Sprint is so laggy on servers
Invalid
MC-20973Server Resource/Texture Packs not working?
Duplicate
MC-39816Sudden very large memory leak on player connect
Invalid
MC-92544Moving block via Piston into area with Entity Causes Ticking Entity Crash
Duplicate
MC-101700Missing server-side check in enderman teleport
Fixed
MC-112989Furnace minecart smoke particles are created for the server as well
Duplicate
MC-114217Lightning strikes are randomized server and client side resulting in too short or too long lightning strikes client side
Confirmed
MC-118106High CPU usage, lag and poor performance on dedicated / integrated servers
Cannot Reproduce
MC-183309Player reach is different for client and server when crawling
Fixed
MC-220390Players can get stuck when attempting to swim under blocks after having previously attacked an entity
Important
MC-229634Server-side crash with exit code 0 whilst using commands to make cats blow up creepers
Awaiting Response