It is not defaulting to list view in the new timeline interaction base on the ticket configuration.
SAP Cloud for Customer.
Reproducing the Issue
Go to the Administrator work center.
Go to the Service and Social view.
Click on the Ticket Configuration.
Here you have set the default status set as List View.
Go to the Service work center.
Go to the Tickets view and search for ticket LMN (where LMN represent ticket name) and open it.
As you have activated the new timeline interaction, you can see in Overview facet their is Timeline section.
Here under Timeline you can see base on ticket configuration, it is not defaulted to list view.
The default List View was only for Interactions facet and not for the New Timeline view.
This is an expected behavior in the current release.
New Timeline Interaction , List View , KBA , ticket configuration , LOD-CRM-SRP-INT , Ticket Interactions , Problem