@byContent not work inner loop element

- The @byContent() does not work inner loop element:
I implement as example codes:
`class ComponentItemModel extends DOMModel {
@byContent('section') content;
}
class ComponentModel extends DOMModel {
@byChildrenRefArray('component-item', ComponentItemModel) items;
}`
My html is as below:
`

my content

my content

`
- When I run the page to test them, the page always loading.

Start by locating the implementations of @byContent and @byChildrenRefArray, then reproduce the supplied nested component-item example. Done means the page no longer remains stuck loading and each inner loop element exposes its section content through @byContent('section').

Written by the indexing model from the issue text.