Hi,
I am daily Cubase user through more than 10 years, but i notice strange behaviour almost every time just before update (major or maintenance) get released or few days after, actually it gets my attention from Cubase 7.
Few days ago i experienced some unusual crashes, and today i get some VST recall issues and suddenly I noticed that cubase scans all plugins again (even if its not time change) and all my preferences including key commands gets reset to default. I enter to the forum and see that 9.5.40 is available (since i turned off all things St.Hub etc the forum is only place where i get info about updates) I almost developed additional sense when its about to get updated 
Anyone experience something similar?