The issue...
When I attempt to use the sleep functionality through Alfred, it dims the screen and the OSX chime sounds starts stuttering, the screen comes back on and the stuttering sound continues until I hit ESC. Selecting sleep through the OSX UI still works.
What you were doing when the issue happened
I was using my computer, per normal.
Whether you were able to replicate it a second time by performing the same action
I am able to duplicate it.
Include any screenshots that might help us
n/a
Include the Alfred version & build number you are using
Alfred 3.1.1 | Build 736, Saturday 17th September 2016
Include your OS X version
10.11.5