Certain issues are not visible and searched on the Kanban board. It was like that all of a sudden about three months ago. And from a month ago, the same phenomenon appeared in the timeline. The status values of certain invisible issues vary. Not only the completed issue but also the ongoing issue has disappeared.
I was solving the issue that could not be searched on the Ganban board as a temporary method by searching the timeline again, but now even the timeline has the same phenomenon, so I can't use that method anymore.
Our Jira type is "Team-managed projects."