Describe the bug
Although the Machine Access Interfaces tooltip says
When in the Processing Array, only holds machines that work in the Processing Array,
you can put following items or blocks into it in the formed Processing Array:

• any machine component such as Motor, Pump, Conveyor Module...
• any singleblock generator such as the steam turbine, the combustion generator...
• the Rock Breaker

Versions
Forge: 14.23.5.2860
GTCEu: gregtech-1.12.2-2.1.4-beta.jar
Modpack: GregTech Expert 2

Setup
SP
New world generated