Refresh Worklogs
As ActivityTimeline Administrator, it is possible to configure whether you would like to synchronize worklogs from Jira into ActivityTimeline or you would like this feature to be disabled.
Also, you can synchronize worklogs from Jira, either partially or perform a full sync.
In order to do it, simply go to:
Configuration → Synchronization→ Refresh Worklogs
Choose what action you would like to perform:

Note: No changes will be made to Jira during a synchronization operation.
Worklogs of disabled projects will not be synchronized. Click on enabled projects link or go to Projects → Project list to change the project statuses.