Started seeing this behavior recently. I compared a project repository with my forked repository and created a Pull Request and merged the changed to my fork.
Now Github is suggesting that my fork is ahead of the project repository by 1 commit and suggesting to create a pull request.
This is correct if we consider commit numbers as a means of calculating which branch is ahead, which does not make sense as the files are exactly same version. The pull request i try to create from this option shows no files.
This behavior is same even if I try to rebase instead of merge.
Am I missing something here?