This is a brand new clean install.
It's the same for me; Sometimes re-starting the Macbook or changing the user account solves this. Do you have your Mac setup for multiple user accounts? I have the feeling that it somehow is related to fast user switching.Maybe - but the issue is, that it sometimes doesn't find anything. and when it finds something I cannot push ENTER to start the app etc. (have to click mouse-button/touchpad).
Something is broken.