Duplicate of BUG-000122812: This is a duplicate of an existing issue where if the refresh interval of the layer and the webmap layer are equal, the layer will not refresh in dashboards. Changing the refresh interval of the webmap layer is a workaround for this issue.
対処法
Manually refresh the page to display the latest updated value.
Use a map service from a registered enterprise geodatabase in Operations Dashboard for ArcGIS.