Latency by shard displays nothing, while latency by instance works

[avikivity]

Installation details
Panel Name: Latencies/99th percentile read latency
Dashboard Name: Detailed
Scylla-Monitoring Version: 4.15.0
Scylla-Version: 2026.1.x

Latency by shard:

Latency by instance:

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Jira issue: MONITOR-69

[avikivity]

Maybe it's due to automatic aggregation in scylla.

[amnonh]

@avikivity can you please add to the jira issue https://scylladb.atlassian.net/browse/MONITOR-69 the details of the cluster, I want to see if there's something specific about it or if it's a general thing