Angular 17: drag and resize, something wrong in component isolation

Question

I have two problems that I cannot identify:

1. When I resize the container2 the container1 is translated vertically.
2. When I switch to resize container1 after 2, the resize works differently, in fact instead of stretching at the drag point it also stretches in the other direction.

Theoretically the component should be isolated from the others, but evidently something is wrong but I can't figure it out.

Link to stackblitz project: https://stackblitz.com/edit/stackblitz-starters-igouxy