DRONE_WEBHOOK_SKIP_VERIFY does not work

Hi I’m trying to get global webhook to work but every time I try I get

error="Post \"https://**.local/webhook-drone\": x509: certificate signed by unknown authority" name=** namespace=** request-id=26YujCPMiyNOSVBQWw724RlDwVj user.admin=true user.login=**

I have tried setting DRONE_WEBHOOK_SKIP_VERIFY=true
But it doesn’t seem to work, this is my docker-composer:

version: "3"

services:
  server:
    image: drone/drone:2
    container_name: Drone
    environment:
      - DRONE_GITEA_CLIENT_ID=**
      - DRONE_GITEA_CLIENT_SECRET=**
      - DRONE_GITEA_SERVER=https://**.local
      - DRONE_GIT_ALWAYS_AUTH=true
      - DRONE_GITEA_SKIP_VERIFY=true
      - DRONE_RPC_SECRET=**
      - DRONE_SERVER_HOST=**.local
      - DRONE_SERVER_PROTO=https
      - DRONE_LOGS_TEXT=true
      - DRONE_LOGS_PRETTY=true
      - DRONE_LOGS_COLOR=true
      - DRONE_LOGS_DEBUG=true
      - DRONE_DATABASE_DRIVER=postgres
      - DRONE_DATABASE_DATASOURCE=**
      - DRONE_WEBHOOK_ENDPOINT=https://**.local/webhook-drone
      - DRONE_WEBHOOK_SECRET=**
      - DRONE_WEBHOOK_SKIP_VERIFY=true
    restart: always
    volumes:
      - /etc/timezone:/etc/timezone:ro
      - /etc/localtime:/etc/localtime:ro
    ports:
      - "6080:80"
      - "6443:443"

It looks like a bug as the environment variable is completely ignored

So? any idea? The problem still persist with the latest version