Lets say I have a background layer that covers a whole artboard. when I lock this layer and then copy and paste layers from other artboards, If the mouse hover over any place of the locked background layer, it highlights all these other layers I have copied or created after locking this background layer. They looked as they have been selected but they are not!.
The problem is if I try to select multiple objects by mouse click and drag, it dosen't select anything and i have to select them either from layers panel or select them one by one using shift + click, which is really frustrating.
This problem happens randomly and i don't know how to reproduce or fix it. I tried to delete and recreate the background layer but after locking this layer the problem back again.