Missing subscriptions when the app is opened from a notification

If I receive a notification (for example, when someone replies to my post/comment), I tap on the notification to open the app, and then proceed browsing the app; when I open the left tray by swiping from left to right I can see my bookmarked communities (which include any multi-community that I've set up) but I can't see any of the communities I'm subscribed to.