Venu 2 Plus keeps locking the screen

Since Dec 6 my Venu 2 Plus locks the screen (padlock symbol) when I swipe up or down from the Home screen. I then have to hold the top right button to unlock it. Powered off/on.  I have tried three different watch faces, from three different developers with the same problem. I have been using Glance Ultra without any problems for the past 4 weeks. Venu 2 Plus software says 19.05 and 5.19.1.2.

Has anyone else had this problem?