I visit at all different times . She can be sleeping in the morning or afternoon or evening. Or she can be awake at those times , no particular pattern.People with dementia do sleep a lot because their poor damaged brains have so much difficulty processing everything that it wears them out.
What time of the day do you visit? I always used to find that mum was at her best in the morning, but by the evening she was either sundowning or falling asleep!
A bit more unsettled since the recent tia.