In the Oil Preview Build I've got a dupe that appears to be sleeping while running on the Manual Generator. The wheel is turning and the generator is making the proper sound effect, but the dupe is lying on the wheel and snoring as if it were night.
Edit: I've also had the bug occur when a dupe used the Message Table and once again when a dupe was eating.
Steps to Reproduce
uploaded a pre-existing colony in the oil preview build
This issue has been fixed in either a future version or updated in a previous version.