What i did was exactly the following:
i was making a really big and complex factory using a single Create Motor to power everything.
After finishing the factory, i placed some Brass Casings on all the conveyor belts.
After that, i tried to turn the factory off using a clutch and a lever.
The factory did not shut down.
Isolating what was running by itself, i found that some belts where bugged and where powering the other components.
Adding another Creative Motor updated the entire system and fixed the issue.

Create Version: create-mc1.16.5_v0.3.1a

Try updating create to v0.3.1c

Try updating create to v0.3.1c

Hard to test, since i could not replicate the bug. But i'll close the thread and re open it if i see the bug again on the C version.