Elasticsearch version 8.13.2edit
Also see Breaking changes in 8.13.
-
Searches involving nodes upgraded to 8.13.0 and a coordinator node that is running on version
8.12 or earlier can produce duplicate buckets when running
date_histogramorhistogramaggregations. This can happen during a rolling upgrade to 8.13 or while running cross-cluster searches. (issue: #108181).