Issue Summary

When a Confluence site is using the new Site Backup/Export it's no longer possible to track its progress, neither via the UI ( /wiki/rest/obm/1.0/getprogress endpoint) nor via database ("long_running_tasks" table).

The same happens when doing a Site Import. Upon uploading the file and clicking "Import", it's not possible to follow the progress until it's completed.

Steps to Reproduce

1. Go to a Confluence site where the new Site Export is enabled;
2. Access the Backup Manager and trigger a new Backup for Cloud (preferably select to include attachments so it takes longer and allows more time to observe behavior);

Expected Results

Check progress for the backup task, either via UI (progress bar linked to /wiki/rest/obm/1.0/getprogress) or via long_running_tasks table (for Support only).

Actual Results

There's no progress update in the UI (it remains in "PROCESSING" until completion) and Network Logs show the following response for GetProgress requests: 

{"size":0,"currentStatus":"PROCESSING","alternativePercentage":"0","concurrentBackupInProgress":false,"time":0,"isOutdated":false} 

Checking table "long_running_tasks" results in a task stating at 100 percent with the message “Site attachments export has been processed”.

Workaround

Currently there is no known workaround for this behavior. Users can only wait for the backup/export to end, hoping it's not stuck somewhere.