Mhh are you referring to the OC setting in Misc-Security tab? If that's the one, I always had it as
Default and never had any problem.
Just a hint - have you tried
Jettison as
@CaseySJ suggested me a while ago? Maybe it helps.
In my scenario, as I said, connecting an enclosure with ASMedia ASM235CM using a Type-C to Type-C connection, makes the system unable to sleep, regardless of Jettison. Switching to a Type-C to USB-A fixes it.
But it's also funny that d2 Professional uses the same ASM235CM (although tweaked?, it seems, as it doesn't passthrough SMART data in macOS, while it works in Windows) and it has no sleep issues when ran with Type-C cable.