Execution history CSS is broken on Jira workflow page

Steps to reproduce:

1 - Go to project Workflow and click on edit workflow

2 - Click on a transition and add a Scriptrunner validator

3 - After adding the validator, execute that in some issue to generate execution history

4 - Once there is executions expand the history and it will be broken like in this screenshot:

5 - it was expected to be like this: