The clock does jump forward when the system suspends. At least some existing implementations of steady_clock in C++ already have this problem, and I think they all might. .... Time with respect to power management state changes is something that the PEP should address fully, for each platform.
I don't think that Python should workaround OS issues, but document them correctly. I started with this sentence for time.monotonic(): "The monotonic clock may stop while the system is suspended." I don't know exactly how clocks behave with system suspend. Tell me if you have more information.
(<https://developer.apple.com/library/mac/#qa/qa1340/_index.html>, <http://msdn.microsoft.com/en-us/library/aa394362.aspx>, <http://upower.freedesktop.org/docs/UPower.html#UPower::Sleeping>).
I will read these links and maybe add them to the PEP. Victor