I wanted to toggle "Show layer controls" but it wasn't working neither from the view menu nor with the keyboard shortcut. I restarted AE and it started to work again
Thank you for reporting this issue. If this occurs again, please do let us know and possibly grab a screen recording of After Effects in this state. Was this only happening in the Beta version of the After Effects or in the release version?
Thanks again for reporting this issue and for any further information you can provide,