Adding environemnt variables is not straightforward anymore (I think there changed something recently):

If I want to add three environment variables, I start by entering the first, click on "Add more" and enter the second one. Now I click again on "Add more" to get the input field for the third and then enter my third env.

Now I see three environment variables and start the build process - which then fails, since only the first two envs are applied. The third env is not saved and not available in the build. I had to click again on "Add more", so that I now see four env fields, then all my three envs will be available.

That does NOT work:

That works: