FIORI into Portal SAML issue

Hello Experts,

He have integrated Fiori Launchpad into our SAP Enterprise Portal with SAML authentication.

Everything works fine, but at first authentication Fiori launchpad doesn't appear. (Cf. screenshot 1)

After refreshing browser or click on Homepage Link Fiori Launchpad is OK (Cf. screenshot 2)

Is we deactivate SAML authentication (i.e with login / password) Fiori Launchpad appear at first time

So it seems that all queries are not called at first SAML login

Have you got any idea ?

Regards

Bertrand