Pro Tools unable to reacquire hardware after resume from sleep

[levelaudio]

First, here are my specs:
MacBook Pro Retina, 15-inch, Early 2013
OS X 10.9.5
Apogee Ensemble Thunderbolt
Pro Tools HD 10.3.2

Everything works fine until my Mac goes to sleep. Then, upon returning to sleep, Pro Tools will give the error:

"Pro Tools is unable to reacquire the hardware because it is in use by another application. Please quit other applications and hit "OK" to retry. If the hardware cannot be acquired, please quit and relaunch Pro Tools"

I've ensured that I'm not using the Ensemble in system preferences for the Mac audio input or output. I've tried quitting every other application including Finder. I've tried power cycling the Ensemble. But no matter what, this message still keeps popping up anytime I resume from sleep, and then I need to relaunch Pro Tools, which takes a few minutes every time.

Does anyone know any way to resolve this issue other than quitting and restarting Pro Tools? I've searched this forum and elsewhere on the web, but still can't seem to find a solution.