@SteveRod,

Unfortunately, it could have been caused by a lot of factors. It may have just been lost while on the way to the camera while being sent. Unless the viewpoint is deleted on the config side, it will remain visible in the app. 

It's also possible that the app was bugged and simply needed a restart. 

It could even be the result of connecting to a different mesh node, or from outside of your network. 

If you experience it again, try closing out of the app, or rebooting your phone - as this would clear the cache for the app and may help clear the behavior.