I am not seeing odd behavior in any app but NVAlt so far - other than one I will address in a separate Scrivener post. But, nothing other than what I have noted with NVAlt according to this thread.
Thu. Aug 29, 2019 10:03 AM: I went to NVAlt. I hit the Hook hot key. I got an empty Hook window. At the same time, I heard my external drive, now asleep, spin up. In the time it takes to spin up the external drive the Hook menu remained blank. This was approximately 5 - 10 seconds. Then, when the drive finished being accessible, the Hook menu suddenly became populated.
Sat. Aug 31, 2019 07:29 AM: I just opened NVAlt. Ran Hook first thing in the morning. More than 40 seconds, empty menu. Click again an NVAlt and triggered Hook, 35 seconds and the list populated.