The shadowing gets me down.
Never heard the term applied in this respect but recognize it... My mother in law has Dementia. She was living at home, had a relative living next door, which made her (and our) life easier. But... That relative has, for years, been disappearing for the whole of every school holiday, leaving us with the task of looking after Mother In Law. this Easter, it became quite obvious that Mother In Law was no longer able to be left alone for even a short time...
I'd wait at her home in the morning until she rose, then offer to make MIL a cup of tea, give her a bowl of cereal. I'd leave the living room to get the tea made, and she'd follow me (that shadowing you mentioned) in a bit of a panic, not realizing she'd only been alone for a minute...
As she's unsteady on her feet, and didn't, in her panic, use her walking frame, it was worrying... Then, left for longer, she took to ringing our landline... we've had the number 40 years, she still knows it. If she failed to get a response, she defaulted to ringing 999... The relative next door removed the batteries from her telephone handset... that resulted in her going out into the street to seek help...
It isn't easy, is it?