Just minutes ago I had LrCC Mobile freeze (spinning circle for 45 minutes) while trying to delete just one photo. Restarting the app did no good. I finally deleted the app, reinstalled and problem fixed.
During the app freeze the deleted image did not show in LrCC desktop OR LrCC web but it did on Lr Apple TV. 'Settings - Reload Collections' would not clear the deleted photo. Only after reinstalling the Mobile app did the system get it all correct.
Though I did cure MY problem, I'd be interested in comments from anyone who has experienced similar.