### Summary [Milestone 11.8](https://gitlab.com/groups/gitlab-org/-/milestones/23) shows a completion rate of 62%, but it's only 47%. ### Steps to reproduce See [milestone 11.8](https://gitlab.com/groups/gitlab-org/-/milestones/23) in group [gitlab-org](https://gitlab.com/gitlab-org) on gitlab.com ### Example Project See [milestone 11.8](https://gitlab.com/groups/gitlab-org/-/milestones/23) in group [gitlab-org](https://gitlab.com/gitlab-org) on gitlab.com ### What is the current *bug* behavior? The milestone completion rate does not match the actual completion state. 316 closed issues out of 666 issues are 47%. Moreover, the graph shows around 2/3 of remaining work, while the completion rate says 1/3 of remaining work ... ### What is the expected *correct* behavior? The completion rate should match the relation between closed and total issues. ### Relevant logs and/or screenshots  ### Output of checks This bug happens on GitLab.com ### Possible fixes 1. check the new algorithm to calculate and render a milestone's burndown chart.