Wasn't that the reasoning behind parents not being able to visit children in hospital back in the day because the children were upset after seeing the parents so it was thought that if they didn't see them often they would be upset less. When it was realised that actually the children were upset all the time but it was most visible after their parents had visited, this changed and children felt less abandoned when they saw their parents more often, so were happier [although obviouisly not happy about being in hospital]
I'd personally worry that this was only masking the symptoms of your granddaughter's upset about not being home, and whether she will worry that you don't want to see her. Especially in this difficult time when everything is different and she may be upset about many things. But what to do. Well it's only facetime that has been stopped, and no one has said no letters so why not letters and a few little bits for both children you can send photos and let them know how you are thinking about them and how difficult it is here with coronavirus, and what is happening here with schools and how different halloween is going to be this year and what will be happening in your town instead. Obviously no promises that you'll see them again cos you don't know when, but stuff that she can look at later on and keep in her drawer and take out and look at at any time. Don't expect anything back, or put any pressure on her to get in contact with you. You could maybe put some little things in like stickers. Try and put pretty commemorative stamps on the letter,
Maybe send postcards too. She will be upset even with no facetime, and most children love getting something in the post.
what is this behavior called does it have a name?
