Title Screen (main menu) ghosting / afterimage with Modern UI + ImmediatelyFast (MC 1.21.1)

[Haku271]

Hi! I’m experiencing a rendering issue on Fabric.

Environment

Minecraft: 1.21.1

Loader: Fabric

Modern UI: 3.12.0.5-build.3+mc1.21.11

ImmediatelyFast: 1.14.1

Issue

When Modern UI and ImmediatelyFast are installed together, the Title Screen / main menu shows noticeable ghosting/afterimages, as if the screen is not properly cleared or refreshed.

⚠️ Note: In-game UI (inventory/chat/etc.) works fine, the issue only happens on the main menu.

Steps to reproduce

Install Modern UI + ImmediatelyFast

Launch the game and stay on the Title Screen

Move the mouse / hover buttons / open Options and go back

Ghosting appears on the main menu

Expected behavior

Title Screen should render normally without any afterimages.

Actual behavior

Persistent ghosting/afterimages on the Title Screen.

Notes

Modern UI alone works fine

ImmediatelyFast alone works fine

The issue only occurs when both mods are installed together

[RaphiMC]

Could not reproduce the issue: https://upload.raphimc.net/u/k27A3y.mp4. Please provide more details, like a game log and screen recording