Disable shaders will result in improper rendering

[ForgeStove]

Describe the bug
Disable shaders will result in improper rendering

To Reproduce
Enter the world, then turn off the shader

Log
https://mclo.gs/MQgkzh9

Screenshots

Desktop:

• MC version: [1.21.1]
• Iris version: [1.8.8]
• IrisFlwCompat version: [2.0.0]
• GPU: [Nvidia RTX 4060 laptop]

[mpustovoi]

It's the same for me, even without enabling shaders. I just installed this mod after the 1.21.1 release and entered my world, seeing all the stuff invisible.
I can provide the logs later when I try again.