Symptoms of dementia in cats include:

Acting disoriented or lost

Vocalizing, often at night

Staring off into space while looking at a wall or corner

Forgetting to eat or drink unless food bowls are put in front of them

Going to the bathroom outside the litterbox

Changes in sleep cycle, being awake and active in the middle of the night

Unusual interactions with other pets or family members (becoming more needy, more reactive, or more aloof)

Forgetting that they have just been fed and asking to eat again

Poor grooming habits

Sleeping more than usual

Unfortunately my cat needs to come and go. Sometimes he's just out there and jumps in (like no hesitation or warning, it's a jump scare every time)

Sometimes he sits out there screaming to be let in though. And my washing machine is in a shed outside.

As an aside, this was a very creepy notification on my door as my doorbell also creates notifications.

"Your doorbell has been activated"

"Don't open the door"