It seems, that sometimes, for maybe various reasons, jobs do not get scheduled and so changes start to accumulated in wb_changes table. To clear them out, we need to run the ResubmitChanges.php maintenance script regularly.
List of tasks about changes being "stuck":
- ResubmitChanges.php is run regularly in production resubmitting changes older than 6 hours
- Tracking is added for the number of changes that was resubmitted
- That tracking data is visible on edit-dispatching-via-jobs Grafana dashboard