Samsung 870 EVO SSD intermittently not detected: "A device which does not exist was specified," only works after overnight sleep

Drive: Samsung SSD 870 EVO 250GB (firmware SVT02B6Q), secondary drive on a Windows PC

The problem:

• The SSD intermittently doesn't show up in File Explorer.
• When this happens, Disk Management shows "A device which does not exist was specified" for this drive.
• Booting takes a very long time when this happens.
• Nothing I try fixes it, but after the PC wakes from sleep in the morning, the drive starts working again.
• The AC is on all night, so the room (and PC) is cold by morning.
• Once it's working, it works fine. I installed Black Myth: Wukong on it and played with no problems.
• But if I shut the PC down and turn it back on a few minutes later, the drive disappears again.

What I've ruled out:

• Cable: tested the same cable with other SSDs, and they work fine.
• SATA port: also works fine with other drives.
• Fast Startup: disabled.

CrystalDiskInfo taken while the drive was working:

• Health: Good (96%)
• Power On Hours: 5120 | Power On Count: 2512
• Host Writes: 17,756 GB
• Temperature: 40°C (max recorded ~51°C)
• Reallocated sectors, program/erase fails, uncorrectable errors, ECC errors, CRC errors: all 0
• POR Recovery Count (unexpected power loss): 145

Has anyone seen this before? Any ideas appreciated.