All things went fine yesterday.
Now the problem came back again.
MDNS traffic is allowed to java and arduino. Still detectable via Wireshark. but with an increased number of communications : 6 out and 6 in.
Tried my mobile hotspot, Another NodeMCU, turn off all firewalls with no success.
Also, upload went great via command.
So i am downloading a portable Arduino IDE, Hope that makes the solution.