The own 2FA apps of my banks inevitably stop working at some point. They shut down immediately after launching them. Alternatively they stop reacting on tapping the "confirm" button. If I leave them unattended for few months, I'm almost certain they'll not work on next use.
I've added a recurring event on my calendar to check login-ability to several apps with which I've had this kind of experience in the past. At least once per month.
