I have a case to trigger rules based on traffic source, but I see in session storage that traffic source is lost when moving from domain to subdomain as below:-
You may want to check out stackoverflow for a general question about local/session storage, answer .
If data is saved on a subdomain, it won't be accessible by another subdomain. The linked answer mentions techniques for gettering around this. As a possible solution from within Launch, you could dynamically update all href's on the relevant <a> elements (dom ready) to include a customized query strings based on data elements or some other custom code. And then add additional logic on the new page to read from the query string.
Since both of your URLs are on the same eTLD+1 (allianz-assistance.es), you could use a session cookie to persist info and make it accessible from any URL that is a sub domain of allianz-assistance.es.
