PC refuses to sleep when OS installed on USB SSD

My pc used to "go to sleep" without any issue.
latly ive install my windows on protable ssd drive, and since then "Sleep" is shutting down pc.
the option "sleep" is visible but it's actually shutting down the pc.

BTW: when i restart my pc through the internal drive (m.2 drive which is on motherboard) sleep mode is possible.
both win versions are 20H2

Is there anyway to put pc on sleep mode while windows is running on usb ssd?

i followed these instructions but it did nothing:
https://www.easyuefi.com/wintousb/resour...to-go.html