Previously when adding a commit to a branch the commit was automatically added to the PR
Hi @sanchezzzhak! Welcome to the Community!
I don’t believe this behavior has changed recently? Are you making changes to a branch in a repository you own, and pushing them up to the version on GitHub? Those commits should get added to the PR automatically.
If you’re pushing to a branch in a fork of your repo, however, it could be that the person that opened the PR is not allowing anyone to push to their branch?