In a Generic test, "Definition" field edition with Wiki Style Renderer, the "Visual"/"Text" tab navigation is not working

If changing the renderer of Test Generic Definition to WikiMarkup.

When editing the definition of a generic test, the tab buttons to pass between "Visual" and "Text" edition do not work properly.

There is only a small line above the text where it behaves like a button and it is possible to change views.

Verified on Jira 8.0.0