Hi, quite new here, hope this message belongs here. 

When we select another scene, for example plain white, it adds 2 lights (selected in attached picture). When we go back to default backdrop - studio room, the 2 added lights stay. Result is that the lighting in that file remains different. Therefore it confuses colleagues what material parts are, because some appear light in their file (when somebody used that plain white scene once there), some appear dark.

Is this a bug, or is this a setting?