You know, sometimes it doesn’t and sometimes it does. And also I’ve been known to forget it overnight and wake up to moldy clothes.
I have a friend who will say things like “I have to go at 3” and get up at 3 on the dot without even looking at her watch/phone. I’m not that guy and I need buzzers, timers, and ambient displays all working together anything done at a time.
OT but if your washing gets mouldy after being left in the washing machine overnight, you need to clean your washing machine (and/or use more detergent).
A bit OT but you may want a side loader. It's obviously not ideal to leave it overnight but the few times that's happened to me there isn't any mold. I'm guessing you have a top loader, it may not have been cleaned in a long time, and that it's in a basement that's prone to mold also.