When you make a change to a segmentation, the picklist value itself changes and you will see the new value showing in parent records.

Where the data grid shows a calculated field that contains the segmentation value, these additional steps occur:

• An UpdateSegmentationLists message is submitted to the Message Queue
• Twice per minute the Robot processes the queue for such messages and applies the change to the relevant records

Therefore, if you update a segmentation and a calculated field relying on it does not update after a minute or so, then it implies that either the Robot is not running, or that the UpdateSegmentationLists job is not active.