How do I use Github and Gitlab at same time?

I’m using Drone with Github for few days, so far so good. One annoying problem is there is no homepage for drone? When I go to drone.mydomain.com it redirects into Github Oath authorization url without telling anything. Actually this wasn’t problem at all for us until today. Today we wanted to connect our Gitlab projects to Drone as well. I’ve edited my environment variables like this:

env:
    DRONE_DEBUG: "false"
    GIN_MODE: "release"
    DRONE_DATABASE_DRIVER: "sqlite3"
    DRONE_DATABASE_DATASOURCE: "/var/lib/drone/drone.sqlite"

    DRONE_PROVIDER: "github"
    DRONE_OPEN: "false"
    DRONE_GITHUB: "true"
    DRONE_ORGS: "REDACTED"
    DRONE_ADMIN: "REDACTED"
    DRONE_GITHUB_CLIENT: "REDACTED"
    DRONE_GITHUB_SECRET: "REDACTED"
    #DRONE_HOST: ${DRONE_HOST}
    DRONE_HOST: https://drone.mydomain.com

    DRONE_GITLAB: true
    DRONE_GITLAB_CLIENT: REDACTED
    DRONE_GITLAB_SECRET: REDACTED
    DRONE_GITLAB_URL: https://gitlab.ourdomain.com

But still when I got drone.mydomain.com it redirects into Github Oath app… What should I do?

I think I found the answer here: Multiple Git Repo Providers

However homepage redirects right into Github Oauth is the right behaviour?

yes, this is the expected behavior