February 2021 Update
A quick maintenance release for the web app to fix an issue on Windows 10 where pressing the windows key was triggering the left nav to run up towards the Inbox.
You should now be able to windows+tab around (as one often does) and still find Nirvana as you left it when you come back.
Thanks to all who reported this.
Shift+reload your browser (or logout/login) if you are still seeing this bug.