Factorio Forums

Steps to reproduce
Set up labs pulling science packs from a belt, and turn on show-active-state debug option. Make sure the belt is moving, i.e. not full.

Expected result
The inserters go to sleep when the lab is full of science packs.

Actual result
The inserters do not go to sleep.

Thanks for the report however that's not a bug, inserters are not required to sleep in any situation. Sleeping is purely an optimization that can be implemented for some things but is not required to be implemented for everything.