Bidirectionnality Account <=> Contact not working in CRM

I searched but did not see any post on that. In the CRM section, when I set link between a contact and an account (“Compte” in french), it never appears the other way meaning :

  • if I set the Account from the Contact, the Contact does not appear in the Account as it should
  • if I add the Contact to the Account, the Account does not appear in the Contact

It seems to me this is a pretty fundamental feature. Is there something that I am missing ?