Bug report: android notification doesn't open app, doesn't disappear.

Bug report: android notification doesn't open app, doesn't disappear.

Droid Turbo 2, Android 4.0. I'm properly notified when there's something going on, but pressing the notification doesn't open the app. It does nothing at all, in fact. When I manually enter the app, everything works fine. The notification doesn't disappear after viewing it in-app, but I can still swipe it away with no problem. App bug, or user error?