Repo not able to reduce size on website

Since the repo is too large I did the instruction in https://docs.gitlab.com/ee/user/project/repository/reducing_the_repo_size_using_git.html

as well as house keeping. However till today the size is still showing the original size on website, although when I clone it the size is indeed reduced by a lot.

Could anyone help me out? Can it be display issue on Gitlab?