thank you to everyone for your help.
For those who have similar issue, quick reminder on the behavior faced: primary domain was working fine when subdomains where only redirecting to the main domain whatever the subdomain setup.
The solution was directly linked to the SSL certs:
The problem did not come from my NS I reminds that this is a dev server and not a production server.
It was linked to SSL certificates, the autosigned cert used for dev was not wildcard and so blocking for https access to the subdomaine, I created a certificate (auto signed) for each subdomain, and not just for the primary one, which have solved all issues.
thx & bisou from french guy