Paintings break when the world opens up, if there is something in front of them, for example, a flower pot.
When I entered the world, all the paintings in my city that were installed in this way broke. It's a nightmare, there are a lot of them, it takes a lot of time to fix. Therefore, if you also use a lot of paintings, I do not recommend entering the world until this error is fixed.
It doesn't work every time, try to re-enter the world a few times.