router missing in report

router missing in report

Hello,
i have created a business map with 31 routers inside. When i run a schedule report on this map i get only 24 routers. When i run a report like Top 100 Routers by Rx Utilization i get on 27 routers. Could you please help me having all routers display on the report as i need to provide KPI to my CIO. Thx a lot.

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