Impossible to apply with atlantis/apply status explicitly checked

[qugu]

This may be related to #453

Running the latest Atlantis from the docker image as per today, Oct 22. Running on a GitHub, with protected branches enabled. The status checks have atlantis/plan and atlantis/apply checked.

Issue
When trying to apply after a successful plan, I get an error message: "Apply Failed: Pull request must be mergeable before running apply.". PR changes can neither be applied nor merged.

Expected behavior
Apply succeeds and only then the PR can be merged.

For the sake of test, the PR is approved. This looks like this:

If the checkmark for atlantis/apply is removed, I can apply successfully, but also merge without applying (which is undesired).

My configuration JSON passed to atlantis:

{
    "repos": [
        {
            "id": "/.*/",
            "apply_requirements": [
                "mergeable",
                "approved"
            ],
            "allowed_overrides": [
                "workflow"
            ],
            "allow_custom_workflows": true
        }
    ]
}

[qugu]

Sorry, this is a duplicate of #523