Summary

When two different users perform bulk operations simultaneously, JIRA will show the results of the operations erroneously.

Steps to Reproduce

1. User A starts a bulk update of a large number of issues: 1k for example.
2. User B start a bulk update of a few issues: 5 for example.

Expected Results

Each user will see the results of their respective bulk action.

Actual Results

Both users will "Acknowledge" user's B bulk operation, as it has started later, and be redirected to User's B query on the Issue Navigator.
Additionally, it will no longer be possible to see user A bulk operation progress.

Notes

Even though the progress will not be available via UI. User's A bulk operation will keep running on the background and will eventually be successfully completed.