I use two macs: a 2019 Intel iMac, and a 2020 Macbook Air M1, both runninng on Big Sur 11.6.
When I use the "Sleep" command (Alfred system command), it works without any problem on my intel iMac,
but on my Air M1, when I type Sleep and enter, it doesn't sleep. But if I type Sleep and click (with a trackpad) the highlighted "Sleep" command in the Alfred Bar, it works.
So, do you have any idea on this weird behavior?