Steps to Reproduce:
Enable the "Improved Input Response" option in Settings > Video
Restart the game
Create a new world
Fly around the world for a while
Observe the RAM usage in Task Manager
Observed Results:
The RAM usage keeps increasing as the player loads chunks. Eventually, the game uses up most of your available RAM. This occurs in both new and old chunks.
Expected Results:
No memory leaks should occur.
Screenshots:
After loading chunks for 13 minutes in a new world:
On:
[media]
Off:
[media]
After playing for less than 30 minutes in my Survival world:
[media]Linked issues
is duplicated by 15
Attachments
Comments 8

Also experiencing it (on version 1.21.2) when enabling beta-apis. Required a hard re-install of Minecraft after disabling enhanced input to eliminate this issue on vanilla worlds that had the Beta APIs checkbox enabled.
Also experiencing it (on version 1.21.2) when enabling beta-apis. Required a hard re-install of Minecraft after disabling enhanced input to eliminate this issue on vanilla worlds that had the Beta APIs checkbox enabled.
Can confirm on 1.21.31 hotfix. Disabling "Improved Input Response" and restarting the game fixed the high memory usage and leak.
When I first open Minecraft:
[media]When I'm in a world with a high render distance with "Improved Input Response" on.
[media]After exiting the world:
[media]