I have the same problem using a Perixx Periboard 805L bluetooth keyboard with my Android Nexus 7 2013. Just noticed it today. Shift + some keyboard characters doesn't result in an uppercase letter. Example Shift + t results in no uppercase or lowercase 'T' character. Shift + b results in subsequent characters appearing as bold lower case letters. Shift + b again toggles bolding off. Behavior only occurs within Evernote. Keyboard works fine in all other apps. For example I'm using it to type and post this forum reply. Also tried recommendation to uninstall and reinstall Evernote. No change in behavior; problem persists.