All server-side telemetry through segment.com has been broken since the release of 5.14. Once this is fixed, access to segment.com is required to verify that data is being emitted correctly again – can use the diagnostic id from community.
Initially noticed that newest config settings aren't reporting telemetry anymore.
After further investigation, noticed that no server-side telemetry is been sent back (e.g. no telemetry for config settings) since 5.14, implying that something in our telemetry broke.
Note that https://mattermost.atlassian.net/browse/MM-15653 reported client-side data such as message posts no longer send telemetry either, which was reported in May.
See description.