I have a node server that has a letsencrypt ssl.
Everything was fine, the ssl was working for my dynu domains and non-dynu domains.
Then I have made my node server have the possibility to have multiple ssl certifications for different domains (my node server is acting as a reverse proxy) and now my dynu domains (magico.ddnsfree.com) stop having https (where it should have) but my other non-dynu domain (dan.mine.bz) has the ssl working.
So I figured out that must be a problem with dynu.

The code that I have added and that break my ssl on dynu was something like a TLS related variable and function and a SNI related callback. Maybe this can help you debug what the problem is.
Can you help me on this?