If your Amazon workspace is timing out too quickly do the following:
1. Right click on an empty part of the desktop and select "Personalize"
From the left menu select "Lock Screen"
Select "Screen timeout settings"
Click on "Additional power settings"
From the left menu select "Choose when to turn off the display"
Click on "Change settings that are currently unavailable"
Next to "Turn off the display" select a setting that suits you
Remember to "Save changes"
That should solve your problem....