Windows VM on OSX Host periodically changes time incorrectly

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I converted my Windows 8 Boot Camp partition into a Parallels VM.

Periodically throughout the day, the clock will change to a seemingly random time. At 12:50pm this afternoon, my clock changed to 4:50am.

I've tried the following configurations:
Parallels Sync Guest clock with OSX host: ON
Windows VM internet time sync with time.windows.com: ON

Parallels Sync Guest clock with OSX host: ON
Windows VM internet time sync with time.windows.com: OFF

Parallels Sync Guest clock with OSX host: OFF
Windows VM internet time sync with time.windows.com: ON

Parallels Sync Guest clock with OSX host: OFF
Windows VM internet time sync with time.windows.com: OFF

All of these configurations result in the same problem. When the problem happens, I open the time settings in the Windows VM and force a sync with time.windows.com and this corrects the problem.
 
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