GIt clone submodule when pipeline child/parent


I can’t get a pipeline containing submodules to clone to work. With a parent/child pipeline principle.
If I launch the child pipeline which contains the submodules, they are cloned by Gitlab-ci.
But if I run the pipeline from the parent, the submodules are not cloned.

I made an example here : clone_submodules · GitLab

Kind regards,
usine logicielle