This was seen on Sandbox on a code which is already merged to stable/carbon.

The title says possibly, as from the two similar test cases, only one has failed [0], it was the one where the listener was on the same member as the shard leader, which has been moved by calling remove-prefix-shard-replica.

In huge karaf.log [1] with some debugs look between removal starting at 19:23:10,608 and suite adding replica back at 19:23:41,773.

[0] https://logs.opendaylight.org/sandbox/jenkins091/controller-csit-3node-clustering-only-carbon/6/log.html.gz#s1-s20-t1-k2-k16-k2-k1-k4-k7-k1
[1] https://logs.opendaylight.org/sandbox/jenkins091/controller-csit-3node-clustering-only-carbon/6/odl3_karaf.log.gz