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Inactive users are displayed on the chart in a grayed-out manner. These users are not automatically removed from the chart. To remove them, you must manually delete them from the individual organizational structure or from the user menu . (tutaj do user list - odnośnik do tego miejsca w confluence). https://coigsa.atlassian.net/wiki/spaces/UPOS/pages/33499/Users+menu#Remove-user-from-the-organization-chart
In the case of users removed from the Jira system, they are displayed in a grayed-out manner for 14 days. After that, they will automatically disappear from the chart within up to 7 days.
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