When the Kogito Quarkus is started in devmode, due to a bug in Quarkus some memory resources are served over http with the wrong Last-Modified http header, ref: https://github.com/quarkusio/quarkus/pull/17154

This impacts the DMN definitions of Swagger/OpenAPI types, per screenshot:

With the result that if new DMN ItemDefinitions are added (e.g.: tPerson, etc) or a new DMN model is added while the Quarkus devmode is running, this is not reflected in the browser used to navigate Swagger/OpenAPI.

To fix this requires Kogito to make use of a version of Quarkus containing the fix above.