Regression : Graph search doesn't take into account group's forms

Summary

When clicking on a node in the graph, the search is done only on the label, not all the forms.

I have created the non existing terms 'écolo' and added an indexed term (here with 10 occurrences)

The graph search on écolo returns nothing. This a determinist behavior replicated on other corpora.

We can't retrieve the documents associated to a node of the graph

(If you can, link to the line of code that might be responsible for the problem)