lockToContainerEdges not working as expected

I have a sample code on codesandbox to illustrate simple usage of `lockToContainerEdges`. It is working here.

https://codesandbox.io/s/vigorous-morning-9sb87

However, using similar codes in my project, it doesn't work. I can drag items outside of the `sortableContainer`. I even tried to use `getContainer` to ensure it is using the right parent container, but it still allows item to be dragged outside. The main difference I can think of is: the component which contains draggable codes are being rendered by JSONSchema form.

Start by comparing the working CodeSandbox example with the project setup, focusing on lockToContainerEdges and getContainer when the draggable component is rendered by JSONSchema form. Reproduce the case and determine why items can leave the sortableContainer; done means the existing usage keeps dragged items within that container.

Written by the indexing model from the issue text.