I'm trying to edit the player object in F2 BIS mapper by selecting edit Obj_dude but when i exit the player stats screen & return to the main mapper window i get just black screen. I'm attaching the screenshot.
It's simply not working / buggy. You shouldn't use the mapper for testing stuff unrelated to map layout most of the time anyway, because Sfall features won't work there. Better to just write some custom debug menu / mode and test in the real game.