A new feature was added in Blender 2.8 that locks the mode of all objects within the scene. 
This week we'll talk about how to turn this off. 

This weeks quick tip - how to increase the screen scale in Blender 2.8. We usually work on Blender on a desktop screen and sometimes the UI can become tough to look at. But blender being blender there is a simple dial to increase the scale. Watch this Blender 2.8 quick tip to find out how!