Changes to Touch ID warning after restarting iPhone due to unresponsive app

Solution 1:

This looks to be an issue with your bank's app. If I remember correctly, apps are notified anytime a touchID change is made, so things like 1Password will request your Master Password to sign in. This popup seems to be of your bank's design, and a software glitch made your phone think there was a change in TouchID.

For future reference, you can confirm that all fingers enrolled in touchID are yours by going to Settings > Touch ID & Passcode. Then scroll to the part of the pane where it shows your touchID fingerprints:

Now, put each registered finger on the sensor and wait until the fingerprint is highlighted, like so:

Ensure that each fingerprint is yours by making sure that your fingers highlight all of the fingerprint options.

Or, you could just set touchID up again for all your fingers.