Hello Everyone, and Welcome to the HP Forums!
I do apologize for the delay in response. With each of your notebooks restarting when coming out of sleep mode, I would suggest first following through the troubleshooting in the document 'Resolving Problems with Sleep and Hibernate Modes (Windows 8)'.
Now, if you are still experiencing the same issue after the above troubleshooting steps, I would suggest disabling Fast Startup. I have included the link to 'Fast Startup - Turn On or Off in Windows 8'.
Please let me know the outcome of the troubleshooting.
Looking forward to working with all of you! :)