Piston activating sometimes causes inventory items and text to glitch out

[Karotte128]

What happened?

Activating a sticky piston with redstone sometimes causes the items in the hotbar and inventory to turn black. Also all text (chat, buttons, ...) turns black. Reloading shader packs does not work, issue even exists on title screen after leaving world. Can be temporarily fixed by mining any block.

Screenshots

Log output

none

Minecraft Version

1.21.3

Iris Version

1.8.0+mc1.21.3

Operating System

macOS 15.1

What is your GPU?

Apple M1 Ultra

Additional context

Tested with multiple shader packs (Complementary, BSL, ...) Only happens on 1.21.3 Fabric and NeoForge.
Other mods: Sodium, Fabric API

[exsesx]

Thanks for highlighting this! I’ve had the same shader rendering issue with Iris and thought it was just my setup. Glad to see it’s not just me—looking forward to a fix!

[kleinesHu]

same issue here (M3 Max, Fabric, Iris, Sodium) - it always happens when holding no item in my hand and activating piston - items restore when changing to filled slot in inventory