Is it a duplicated question?
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Haven't found any duplicate. (I'm not ceratin on the terminology regarding this problem though, so please correct me if I'm wrong).

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It sometimes happens, that my internet connection goes down. In that case, Uptime Kuma reports all of my services as down, even though only my internet connection is down. This leads to a lot of messages and incorrect uptime stats in the dashboard.

Describe the solution you'd like
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I'd love some kind of 'health check' (not sure if that's the right term) in the settings, in which I ping a reliable service (e.g. Google or Cloudflare DNS). If that reliable service is down, Uptime Kuma would assume that my internet connection broke instead of all my services. It could then send only one message instead of tens/hundreds. It also could omit the data of the services from the logs or mark them differently, to prevent incorrect uptime numbers.

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Instead of, or additionally, you could make an exception, if more than x services go down at the same time, or all of the services go down at once. This could create problems though when shutting down a server with multiple services, or when only monitoring very few services (would potentially lead to false positives).