Tabs keep Closing in Inspector in Cubase 9

Not exactly a showstopper, but why do the tabs in the inspector window keep closing up whenever you close a project. It’s a bit annoying having to click back on all the tabs to open them again each time you reopen a previous project. Cubase 8.0/8.5 maintains your open tabs even after quitting and restarting the program. Unless there’s some new preference setting that I’m missing, this should be looked at.