Hi! Can someone please help with the door handle as it's coming out from the spindle so you can see the black part. As you can see from attachments, when I push the handle back inside, it looks normal but then you can see the black part from the other side. I assume there are something that needs some tightening. Is it normal that door handles come off like this? Is it normal wear? And please give me some good tutorial video or diagram as I have not found any that is describing the exact problem I have. The door itself is a security type metal door so I really want to fix this handle as I feel like pulling it off when opening/closing the door. Thanks!