User claims are not populated

[dom-42]

Hi

I configured mi WSO2 IS 5.3.0 to use your JWT OAuth2 token generator.
It works fine and I'm able to add my own claims to the resulting payload.

However, the user claims themselves are not poputated (UserAttributes is empty).
I use a local claim dialect with some extra claim URIs and my User Profile is filled accordingly.
I guess I missed something but I can't find where the issue comes from.

Would you plz help ?