I’m having the same issue. I can’t understand what he trying to say ,if he has to repeat it most of the time he can’t remember what he said. He sleeps a lot but the last week he’s slept more than usual in the day and has no problems going to bed at 8 o’clock at night and sleep all night. He does seem more confused and thinks someone is in the house or if they’re hungry when we set down to eat. I’ve noticed he has started to wondering in the house and at times he stares into space. I have no idea what stage he’s in. He was diagnosed 4 years ago but I saw signs before then when he couldn’t follow simple instructions on how to do something. Can anyone give me a guess as to what stage he’s might be in?