Ghost Contributor on Github (Github Bug)

Question

Hello StackOverflow.
I came across a strange bug on Github.

Repository Link

I created a repository 4 months ago. And added only 2 contributors to that repository.

• I didn’t add anymore contributors But There is another contributor added.

• I tried to remove that contributor but couldn’t find him on Collaborators & Teams - Manage Access

Answer 1

You have to set the Branch protection rule by enabling Require approvals under Settings > Branches > Branch protection rules > Require a pull request before merging > Require approvals.

Answer 2

It is not a bug.
Who ever does changes to code are considered as contributors.