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I didn’t consider it as valid, one on (phone and internal nvme1), the second one on nvme2 and the third one in the cloud.
Though I have only two copies of normal data myself, I consider live and cloud to be enough for most data. Everything very important has more backups in other ways (bitwarden has an exportable local version on every logged in device, images are stored in immich on my server making it 3 devices)
Check DNS, MTU and do a full wireshark capture from the Client using both curl and the browser.