I had this same paper issue! I solved it by using heavier weight paper. I think it’s just wear making parts looser. I think it just sincerely can’t grab the cheap, thin sheets as well as it used to. If I were more mechanically minded, I’d be tempted to get in there and see if there was anything I could adjust. But just using heavier paper solved it, so I haven’t gotten to the “if it doesn’t work, force it; if it breaks, it needed replacing anyway” stage.