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all shaders cause MC to lag in windowed mode #2908

@RochCharron

Description

@RochCharron

What happened?

anytime i try to enable any shaders while in windowed mode the game lags and slows down to 1fps or less after a few seconds. F3 menu still shows 60-100 fps. switching game to fullscreen mode i get full performance. switching back to windowed immediately makes the issue come back. turning off shaders and playing the game with default MC rendering works perfectly fine in both windowed and full screen

list of shaders tested:
BSL_v8.2.07.1
ComplementaryReimagined_r5.6.1
ComplementaryUnbound_r5.6.1
FastPBR_v1.1
photon_v1.2a
Solas Shader V1.8

all listed shaders caused horrific slow downs while in windowed mode and perfect performance in fullscreen.

PC Specs:
AMD Ryzen 3900x
Nvidia RTX 3090 (driver: 581.57)
32GB RAM

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Minecraft Version

Minecraft 1.21.10

Iris Version

iris-fabric-1.9.6+mc1.21.9

Operating System

Windows 11

What is your GPU?

RTX 3090

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