What happens to issues linked to a milestone when the milestone is achieved?

When a milestone is achieved in GitLab, the issues linked to that milestone do not get automatically closed or affected in terms of their open or closed status; they remain open for further tracking. This allows users to continue managing those issues, whether for additional work, follow-up tasks, or to keep them visible for future reference.

This approach helps teams maintain comprehensive oversight of their projects, as even completed milestones may have outstanding issues that need attention. Therefore, issues can be tracked separately from the completion of the milestones they are linked to, which can be valuable for ongoing project management and progress evaluation.

In contrast, some other options imply actions that do not occur to issues linked to a milestone upon its achievement. For instance, deleting or closing the issues associated with a milestone would not provide transparency or allow for ongoing reference, defeating the purpose of keeping a historical record of project tasks and discussions. Archiving may not apply to the issues either, as archiving generally pertains to project organization rather than the status of specific issues.