Articles don't show after using filters in Knowledge app (within a ticket)

When using the Knowledge app within a ticket, it would be great for agents to be able to make use of the filter system to select a specific collection of tickets to view in the list.

For instance, it would be great to drill down the filter to sections / categories as you see below so agents can look at a full list of the internal/staff articles we have set up in one go - without having to navigate outside of the ticket they're currently' working to get guidance.