Class index seems to be broken when 2 classes have the same name in two different Maven modules

I have a maven project which contains 33 modules. Two of those modules have classes with the same name (RdnTest), both are testing different things.
When running the tests by end, all is fine.
But when I select a single test and double click on it to open the class in the editor, it opens the wrong one.

This happens in this version:

```
Eclipse IDE for RCP and RAP Developers (includes Incubating components)

Version: 2026-03 (4.39.0)
Build id: 20260305-0817
```
The project I'm working on is https://github.com/apache/directory-ldap-api, the two classes are `DnTest` in modules `api-ldap-module` and `api-integ`

FTR, I never faced the issue in 20 years and multiple eclipse versions.

IMO, the class index must have been borked at some point, the only way to get back to my feet is to delete the projects and to reload it. It's a workaround that works once, then it breaks again.

[eclipse-description.txt](https://github.com/user-attachments/files/27697862/eclipse-description.txt)