by Cédric Gerbault.
So in the end, the problem was right in front of my eyes, my first screen and the chrome alert on our custom cookie (made because we have a cluster of moodle nodes and a load balancer in between) we were setting the cookie ROUTEMOODLE without any SameSite attribute, Chrome default is Lax and Firefox is not doing much on it yet.
Anyway thanks again for your help, i needed it to clear things in my mind.
Anyway thanks again for your help, i needed it to clear things in my mind.