Dear Martin Rune Cichos,
Good day! Thank you for posting in the Microsoft Community. We are happy to help you.
I've checked from my side, this is a known issue, there currently two different Service incident for issues with low network connectivity in the Microsoft 365 admin center.
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Incident TM598394: "Admins may notice that some network assessment scores are lower than expected in the Microsoft 365 admin center".
Title: Admins may notice that some network assessment scores are lower than expected in the Microsoft 365 admin center
User impact: Admins may notice that some network assessment scores are lower than expected in the Microsoft 365 admin center.
More info: The impact affects some customers and specific to admins viewing Microsoft Teams for network assessment scores in the Microsoft 365 admin center on the Microsoft 365 network connectivity page.
Current status: We've identified that a code regression in a recent update has introduced a network score calculation error resulting in inaccurate Microsoft Teams for network assessment scores in the Microsoft 365 admin center. We've developed a code fix which is being validated to ensure it will successfully remediate the problem before we apply it to the affected environments. Once the fix is validated and deployed to prevent further impact, we'll backfill all of the impacted historical Microsoft Teams network assessments data to correct score accuracy, fully resolving the issue.
Scope of impact: Impact may occur all admins that are assessing Microsoft Teams for network assessment scores in the Microsoft 365 admin center when those scores are being calculated through infrastructure where the code regression was deployed.
Start time: Saturday, April 22, 2023 at 8:00 AM GMT+8
Root cause: A code regression in a recent update has introduced a network score calculation error resulting in inaccurate Microsoft Teams for network assessment scores in the Microsoft 365 admin center.
Next update by: Saturday, June 24, 2023 at 5:30 AM GMT+8
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Another one is MO598721: "Admins may be unable to view up to date network connectivity report data in the Microsoft 365 admin center".
Title: Admins may be unable to view up to date network connectivity report data in the Microsoft 365 admin center
User impact: Admins may be unable to view up to date network connectivity report data in the Microsoft 365 admin center.
More info: Data after June 18, 2023 will not be viewable in the network connectivity report. Reports will still be shown, but data will be from prior to June 18.
Current status: After our investigation of reported upstream data, we suspect that a code issue was introduced within a previous update. We're working to repair this code issue and potentially alleviate impact.
Scope of impact: Any admin trying to view current data in the network connectivity report may be impacted.
Start time: Sunday, June 18, 2023 at 3:00 PM GMT+8
Next update by: Tuesday, June 27, 2023 at 12:00 PM GMT+8
For affected customers to easily identify the information here, this thread will be closed. You may subscribe to this thread or refer to SHD for updated information. If a new update is available for the resolved or restored status, I will update the web page address in this thread accordingly.
We apologize for any inconvenience this may cause and appreciate your patience and understanding.
Sincerely,
De Paul | Microsoft Community Moderator