Asobo has nothing to do with it. It was a Microsoft Windows update that fixed the problem.
If your pedals are generating any noise due to dirty potentiometers (and CH pedals are very prone to this), it will prevent your computer from sleeping. My controllers all use Hall effect sensors which are noise-free. Before the Windows update my computer would never sleep no matter how long I waited. After the update, sleep mode works correctly 100 percent of the time.