Describe the bug
For my usecase I want to access the springdoc specific application.properties at Runtime. I thought it is a smart idea to reuse springdoc's exsiting SpringDocConfigProperties class which can be autowired. Using this class I have type safety and avoid re-reading all the springdoc properties from appliation.properties again.

However, SpringDocConfigProperties.getGroupConfigs() returns twice the size of the actual configured amount of groups (e.g. in my example I configured 4 groups, but 8 are returned). Each group gets duplicated.

To Reproduce
Steps to reproduce the behavior:

• Spring boot 3.2.3
• springdoc-openapi-starter-webmvc-ui:2.3.0
• application.properties:

  springdoc.group-configs[0].group=Group0
  springdoc.group-configs[0].packages-to-scan=com.my-package
  springdoc.group-configs[1].group=Group1
  springdoc.group-configs[1].packages-to-scan=com.my-package
  springdoc.group-configs[2].group=Group2
  springdoc.group-configs[2].packages-to-scan=com.my-package
  springdoc.group-configs[3].group=Group3
  springdoc.group-configs[3].packages-to-scan=com.my-package

• Application.java:

  @EnableScheduling
  @SpringBootApplication
  public class Application {
  
      @Autowired
      private  SpringDocConfigProperties springDocConfigProperties;
  
      public static void main(String[] args) {
          SpringApplication.run(Application.class, args);
      }
  
      @PostConstruct
      @Scheduled(fixedRate = 1000)
      public void printSize() {
          System.out.println(springDocConfigProperties.getGroupConfigs().stream().map(GroupConfig::getGroup).toList());
      }
  }
  

Expected behavior

• Should print [Group0, Group1, Group2, Group3] every 1000ms
• Actually it prints the expected text only once. Afterwards it starts printing [Group0, Group1, Group2, Group3, Group0, Group1, Group2, Group3]
• Apparently, at some point after the start, all GroupConfigs get duplicated