[JENKINS-12428] Messed Configuration Matrix table

---
Originally reported by nickolay_martinov, imported from: Messed Configuration Matrix table

• status: Open
  
• priority: Major
  
• component(s): matrix-project-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 2
  
• imported: 2025-12-06
  

environment

```
Jenkins ver. 1.446

HP-UX B.11.31 U ia64

java version "1.6.0.12"

Java(TM) SE Runtime Environment (build 1.6.0.12-jinteg_12_aug_2011_05_51-b00)

Java HotSpot(TM) Server VM (build 20.1-b02-jre1.6.0.12-rc1b1, mixed mode)

```

1 attachment

- [Clipboard-1.gif](https://issues.jenkins.io/secure/attachment/21429/Clipboard-1.gif)
> 

Start with the matrix-project-plugin and inspect the attached Clipboard-1.gif alongside the reported Jenkins 1.446 environment. Reproduce the malformed Configuration Matrix table if possible and use the observed discrepancy to define the fix; done means the table renders correctly.

Written by the indexing model from the issue text.