My PWD went through a stage of sleeping all the time, to the extent his daughter reported me to SS for negligence, suggesting I was letting him sleep his life away. (He also got hold of the car keys once when he still had a licence but we didn’t want him to drive) Nothing I could do would stop him wanting to go back to bed. In fact, he got excited at the prospect of being allowed to go back to sleep after breakfast.
Further down the line, he has had a serious stroke and has nighttime insomnia every other night. I’m fortunate to have live in carers but they are destroyed by an all night session as they do half the night each and can’t function properly during the day when he needs 2 people for personal care. I can hear them at night and I also have broken sleep but I have done my turn too and obviously, I am caring for him with them in the day. His constant talk of being useless, finished etc and begging for help to cure him is soul destroying and exhausting for us all. We have tried getting visitors in to keep him awake in the day and tire him out but it doesn’t work. He’s awake all day and night! The awful thing is, he’s desperate to sleep but can’t and is so depressed and frustrated by it. He’s also bedbound from the stroke and it has advanced his dementia somewhat. We often think he’s gone to sleep but 5 minutes later he’s wide awake again and wishing he was dead. But when he gets to sleep, it is so deep we can’t wake him to try to get a routine.
I’m sorry I’m not much help, but I’m just saying that sleep patterns are erratic. Sometimes I turn my back for a second and he’s asleep but not for long. He is often confused for a while after waking again and doesn’t realise he’s at home.