sleep pulse ox only works in the scheduled time range

and I want manually control the sleep mode, so given that the sleep schedule cannot be manually disabled, I set it from 00:00 to 00:01, and then funny things come, my watch didn't record any sleep pulse ox at all! It thinks I only slept for a minute, even though it recorded my full sleep cycle.

You can activate/deactivate sleep mode, manually, from the menu that appears when you long-press the top left button or set a hotkey from the system settings.

Pulse ox will probably follow the automatic sleep schedule but I'm not 100% sure about it.

I know, but the "sleep schedule" cannot be disabled, I don't want to disable the sleep mode again and again when it automatically into the sleep mode that I'm not sleeping, every day.

And I can confirm that the sleep pulse ox is follow the sleep schedule time, I've tried test it several times.

My bad...i misunderstood your second message. 

It's definitely bad that pulseox is following only the set sleep schedule instead of the sleep mode.