Create an application using Spring Boot (2.0.2.RELEASE) and Camunda Spring Boot Starter (3.0.0) with webapps.
Create custom configuration (localization, styles etc.).
The custom configuration isn't loaded. Localization and css styles remain the same, and upon inspection, the customization script config.js is not loaded, i.e. the default one is present in the running application.
Tested and replicated with new Spring Boot Starter (3.0.0) project and by upgrading from 2.3.0 to 3.0.0 (project attached). Feature works on Camunda Spring Boot Starter 2.3.0.