Been happening after initial install of latest build I think since the first day but only infrequently. Now it happens like others are stating every time you unlock the phone. Running developer build on multiple devices and it's driving me nuts. I was hoping for either the GM or new Beta build today to put this pesky varmint down. Uggghhh. Removing Beta Profile will not help. Only rolling back to 14.1 production release or waiting for new build or GM of 14.2 is resolution.