Some accessions with top containers are not appearing in search and browse results
We also had a tech support report of an issue with accessions no longer being findable post-top container merge when on of the top containers had accessions linked to it. See http://lyralists.lyrasis.org/pipermail/archivesspace_users_group/2021-February/008161.html
It’s possible that this came in with the merge top containers feature, or it may have a different, fairly recent, cause.
For anyone looking at this issue, the cause is merging a top container with links into a container that has no links. 3.0.0 includes a fix and runs a process at the time of upgrade to determine if there are any containers with this problem. It only applies to people who used the top container merge feature introduced in 2.8.0. From 3.0.0 forward it should not be possible to create this problem.