I'm using v3, and when I added the force_orphan: true option in my deploy step, keep_files: true seemed to stop working. Existing files on gh-pages were not kept.

The corresponding commit is EpistasisLab/pmlb@67f34be, whose actions log is here.

What I was hoping was to keep the existing files, add changes, then deploy to gh-pages as a single commit. If this is not possible, perhaps a warning would be helpful for users who expected the two options to work together?