During merge, data may be lost during merge due to JGroups temporarily reporting the nodes as crashed.
Bela Ban <bela> updated the status of jira JGRP-1910 to Resolved
The issue still persists, i.e. the sequence of merge views does not necessarily meet the requirements as described in JGRP-1910. Bela proposed further investigation (either as a part of JGRP-1910 or creating a new issue if required).
Updating JGroups to 3.6.3: https://github.com/infinispan/jdg/pull/636