am using Minecraft Bedrock Edition version 1.21.121 on Windows 11.
I enabled the Improved Input Response option in the Video settings. After enabling it, I cannot disable it: the toggle is greyed out and unclickable.
This causes a serious problem: the game starts consuming RAM excessively (memory leak). RAM usage keeps increasing while playing, causing severe lag, freezes, and FPS drops.
Observed Behavior:
Initial RAM usage is normal → 1–2 GB
After a few minutes of gameplay → RAM increases beyond 10–15 GB
The game lags and can eventually freeze the PC
The issue occurs even without shaders, texture packs, or add-ons
Expected Behavior:
Improved Input Response toggle should be disablable
RAM usage should remain stable, without continuous increase during gameplay
Steps to Reproduce:
Open Minecraft Bedrock 1.21.121 on Windows 11
Enable Improved Input Response
Enter any world (even empty)
Observe that the toggle cannot be disabled and RAM usage grows rapidly
Platform:
Windows 11
Minecraft Bedrock Edition 1.21.121
No add-ons or shaders active
PC with sufficient RAM (e.g., 16 GB)
Request:
Make the Improved Input Response option disablable on Windows 11
Fix the memory leak caused by this option
You need to disable Vibrant Visuals, see MCPE-230699.