SF Authenticator App Bugs

Hi All, 

Have any of you had any reports of the SF Authenticator app sending approval prompts even when a User is not trying to log in? 

I have now had two reports of this behaviour and I am unsure what to do. The login and session mgmt logs are not telling me anything. 

Is it enough to have them uninstall/reinstall the app and disconnect on their User record? 

Any insight would be helpful! Thanks!!