Loss of visibility to traps on phone app map

Hi again Lenore,
Just an update to let you know one of my trappers experienced this problem yesterday running V6.4.11(603). The phone was a new iPhone so has the latest release of IOS installed.
He could update traps assigned to him from the ‘List’ but they didn’t appear on the Map. I asked him to log off and onto the app and the traps re-appeared on the map.
Thanks, John