Whenever doing something like
docker exec -it <container-name> flask pear <command>
the instance restarts. This has the unfortunate effect to lose the up-to-date instance list for cross-instance search on those setups where several instances run in parallel. Not sure what the fix would be, but something to investigate.
Temporary fix: admin should click on the 'refresh' button in the PeARS interface after running the command from the CLI.